I’d get a job. Lifting heavy things. They want an aircraft carrier put in dry-dock. Cool, I can do that. They need a big dam-site excavated: hand me a shovel. Mere physical strength will always be marketable.
For the record, this is also basically an episode of Rick and Morty, though with the extra twist of extra levels of micro-civilizations, each one supplying the upstream one. Some characters argued that it was “slavery with extra steps”, but also couldn’t reliably distinguish between that vs. the normal way a civilization operates, so the lesson was a bit ambiguous.
Loved that story, who was it? The tv show about it didn’t quite do the short story justice. ETA Should have quoted the sand king post.
George R.R. Martin, of Game of Thrones fame. 
wipe onions off the face of the earth forever
I’m just here for the free wi-fi, honestly. Has the password changed?
Yes, “Sandkings” is a great short story by George R.R. Martin. Won him all kinds of sf awards.
John Scalzi’s very good military sf novel Old Man’s War includes a darkly funny scene with human-sized soldiers going up against a tiny humanoid race of aliens. It goes about as you would expect.
Abuse it.
Galactus is on a bit of a different scale than this example, though. At the size shown in the OP, I feel that an advanced enough civilization should be able to sustain such a giant being. They would need to devote an absurdly huge portion of their economy, industry, and labor to the task, but I do think it would be possible. For me the appeal would be the opportunity to have absolute control over the way their society develops, though.
Probably the best way to prevent an uprising from occurring would be to eradicate their military preemptively and demolish their government buildings so they no longer organize. Alternatively, having them offer up their highest government officials and military leaders as hostages could work. Needless to say, I’d punish any attack by stamping my feet on their towns to a point where they’re too petrified to even think about doing it again. If they were the initial aggressors, I would even argue that such a reaction is justified.
I am contrary enough that the headline of the post mentions “absolute power,” and I think “electricity.”
Being on solar, with batteries and a generator backup makes you much more aware of your power consumption. So, “absolute power” means I can run the washing machine, the dishwasher, the microwave, the mixer, the toaster, the rice cooker, the bullet blender, the vacuum, the iron, the television, all television doodads, all computers, the printer, all the window A/Cs, every single power tool and anything else we can find. Plug 'em in, turn 'em on, let 'em all run!
That’s POWER, absolutely!
~VOW
I am a workaholic. I would force everyone to work hard while I myself would work all day long 24/7.
And again, if these tiny people were humans or anything similar to humans, they would still come up with a way to kill your butt. All the faster because you have seriously incentivized them to do so - you have slaughtered a large portion of their people once, and have made it clear that you’re willing to do it again. You’re an existential threat. They will absolutely kill you.
You wouldn’t have absolute control - you’d drive the rebellion underground, somewhere outside of the sight of your oversized eyes. And if you’re being an ongoing drain on their economy to feed and support you, you will even be handing them a clear avenue to attack you - by poison, or sabotaging your food supply via some other method.
It’s worth noting that for those wanting to control a real society like you would the Sims, the massive difference here is that the Sims are unaware of you and don’t know they’re being controlled. You know that if that weren’t the case, every single one of us would be hunted down by an army of angry digital constructs, pushing us into a pool and removing the ladder.
Are you kidding me? If you basically own the world, you’re the one who has to run it.
Fuck that noise.
Poison would seem to be their only viable method of assassination if I preemptively crushed their military or ordered it disbanded Once that was done, I think I’d be safe as long as I could find outside resources.
And just as they would be seriously incentivized to try to kill me, they would have to know that I would be seriously incentivized to do the same if they staged some attack or assassination attempt which didn’t succeed.
To further drive the point home, I’d purposely demolish the structures they’d normally consider sacrosanct – buildings that wouldn’t normally be military targets. I’d stamp my feet down on their schools, hospitals, nursing homes. Imagine how powerful a deterrent it would be to know that any dissent could result in a massive, white sneaker flattening their schools. With no way for them retaliate, I would want to be as cruel as possible and terrorize the hell out of them. People who live in a state of constant terror and paranoia are easily controlled and unlikely to organize. 
You’re absolutely correct. When the Nazis attacked France and crushed it, demoralizing the populace, there was no French resistance. Solid fact, because all people can be cowed and broken by somebody who attacks civilian structures. Hell, Britain conceded as soon as it was bombed.
Ya’ll are twisted.
I think I would be overwhelmed by the responsibility of caring for an entire race of people and either walk away or go mad. I couldn’t even handle the Civ games, what on earth would make me capable of handling this?
Nice examples. Those didn’t even occur to me. I think if a population realizes that you don’t care to discern between old and young, strong and defenseless, and man, woman, or child, they are less likely to submit and instead will lash out in desperation thinking they have nothing to lose, just like you described.
Besides making examples out of a couple of hospitals or schools, I would even stamp my feet down on their suburbs occasionally, to further reinforce the feeling that they are in a perpetual hostage crisis. As well, I would probably keep a number of them as literal hostages, housing them within a glass container that I could fit into my pocket. With a batch of personal slaves, I could force them to do the unspeakable, demoralizing the populace further.
Well, I think I at least made it pretty clear if I were a giant to a race of tiny people, I would fully intend to fulfill the role of a dominant oppressor. 
Well, a hostage crisis only works if they think you’re going to release the hostage anyway. If it’s clear that you have no intention of ever releasing the hostage, then the obvious choice is not to submit, but to mount a rescue.
(And given the situation, you’ve made it clear that the first step in freeing their society is to kill the ‘guard’.)
You’re not really going to convince me that you can cow the entire populace - there will be those that submit, there will be those who grumble, there will be quislings, an there will be those who form a resistance. Which means that your plan for retaining power (and life) would depend on stamping out such resistances. And while your size relative to them might lead you to think you can literally stamp them out, their size relative to you will make it much easier for them to hide from your sight and your wrath. Whichever resistance eventually succeeds in killing you will be the one you literally don’t see coming.
We humans have to worry about bedbugs in our mattresses. Your bedbugs will literally be trying to murder you.
Give me Q like powers here on Earth then we’ll talk.
If I were stranded on a planet of ant people, I think I’d off myself rather than go the sociopath route.