If your sidekick quits, it is probably not a good idea to hire his girlfriend for the job in an attempt to make him jealous so he’ll ask for his job back.
If you are a sidekick, and your boss fires you, it is probably not a good idea to steal contingency plans from his computer to unite your cities assorted criminal gangs under his control and try to implement them yourself in an attempt to get your old job back. Bad things can happen when you do that.
Someone should be on monitor duty on the satellite at all times, just in case a non-superpowered spouse of a member of your organization gets bored and decides to pop up and do some stargazing. You never know what costumed supervillians might come by looking for trouble…
Always keep a fire extinguisher arrow handy, just in case a cranky yellow skinned demon wants to breathe fire on you because your soul isn’t actually inside your body.
If you’re going to get blowed up with an airplane, make sure Superman is nearby so Hal can resurrect you using lint from his cape.
If one of your friends dies, try laying him out in the sun for a while and see if he gets better.
Being able to thread a needle underwater looks cool, but it is not a terribly useful skill. Work on deflecting bullets with your bracelets.
Never let a man chain your bracelets together.
Let your hair grow long, grow a beard, and lose the orange shirt. Really, you look much better that way.
With great power comes great responsibility.