I just kept mine in my closet on the shelf. Not really hidden at all. My parents didn’t invade my space…
My sister and I used to have on-going cigarette wars. She’d find and steal mine, and vice versa.
Then I hit upon the idea of taping my pack to the inside of my bi-fold closet door. Not very practical, but extremely effective. 
I’m lucky enough to have grown up with parents who believed in giving me -lots- of privacy, so I actually had a small (1 cubic foot) fire safe in my closet, for which they didn’t care to know the combination. It usually contained cigarettes, lighters, and a gallon or so of vodka. Besides that, I would lock things in my glove compartment that I didn’t want found. There was a spare key to the car hanging with all of our other keys in the mudroom, but nobody ever looked. Sometimes the most obvious places are the best.
A FOAF keeps his pot stash wedged in the battery compartment of his cellphone. He was arrested once for public intox and the police didn’t find it, so apparently the spot was a good one.
Jeez, that would have worked for me up until about 1988.
After that, I’d have looked like a bit of a berk lugging the damned thing around. 
No one was around when I practiced, so I just emptied the hi-hat and put everything back when I was done. When the apparatus was apart, I reverted to one of the other methods.
Lemme guess—the drum in question had the front head intact? 
I used to hide money in an empty flashlight for awhile, but my sister caught on. I also used the back battery pouch of some electronic stuffed animal (it was a purr-tender…it purred or something), and the inside of a globe. And, my favorite, when I was living at my mom’s last year, the ceiling. Gotta love drop ceilings.
Now I don’t have any really good hiding places, but Sara really doesn’t care, so I can leave just about anything sitting on my dresser, and she wouldn’t even look
When I was in Basic Training in the Air Force, we used to hide contraband in the drop ceiling over the day room. The last week of basic, the training instructor (drill instructor) made an offhand remark that lots of stuff was usually found in the ceilings.
Why, BlueMit! I’m so flattered. I never thought you’d use that!
I’ve never really had anything to hide, as noone steals my money, and I definitely don’t smoke. If I was going to drink, I certainly wouldn’t hide it in my house.
I really can’t think of anywhere I could have or can hide stuff in. Maybe down the return vent?
Mine is sorta dull…I didn’t really have anything to hide until I was in college (the couple years I lived w/parents and commuted.) I did ask for a briefcase one year in high school, used it for like one day and abandoned it because it was heavy. It had combo locks so later when I was old enough (brave enough, really) to accumulate assorted smut and buzzing devices they went into that which I think sat innocently in the closet.
Once when I was a kid I swiped a packet of Jello from the pantry, and while eating it raw from the package it slipped out of my hand and spilled on the light carpet. I’m sure you can guess what rubbing a wet rag over it did, so I effectively “hid” the stain for a couple years by moving my beanbag chair to that side of the room, lol. When my mom finally found it though she was PISSED.
Wha Wha WHAT?
In the fonts folder. Of course, my parents’ utter lack of computer skills meant that this bit of cleverness didn’t help me any, but it was fun to discover and do.
Generally, if someone’s looking for something, I keep it on me. If not, then hiding is less important than where no one will notice it.
I’d hide things in plain sight too.
I used to hang my combats (BDUs for you Yankees) on my wall.
The pockets fit mickeys of vodka nicely.
As a kid, I had a Raggedy Ann and Andy pencil sharpener and stapler set. Ann’s hat would come off, from years of the glue no longer sticking. I kept money in there.
Many moons later, I’m a anal-retentive house keeper who has to have a box for absolutely everything. One good thing you learn, is that if you take the lids off the top, but leave them firmly attached on the bottom, they’re good for hiding naughty notes and stuff.
Also, here’s another vote for “in plain site.” Still the best idea around.
As a kid, I hid everything in my closet. It was a mess, I couldn’t find anything in it, Lord knows no one else could find anything either.
As an adult, I hide money in the bathroom, in a tampon box. No one ever looks in there.
I hid porn mags under the drawers of my dresser. You know that space just to the right and left of the track the drawer rides in? There.
Cigs were hidden above the afore mentioned drop ceiling in the basement.
When I was a kid, I had a pedastal sink. You could reach behind it to where the water pipes connected. There was a huge open space that you would never guess was there by looking at the front. So I’d just tape my cigarettes and baggies of stuff under there. Now I go for the plain sight method. I have a quite large, um, adult toy. I just sit it on a table right behind my door among all the candles. No one’s noticed so far.
I had a stuffed Snoopy radio that zipped up in the back. I’d hide all my money behind the radio when I was a kid.
When I was a teen, I’d hide my ashtray up behind the closet door where there was a small ledge. It was a nicked Dunkin Donuts cup. One day I found it sitting on my dresser. It was a sign from my parents. They Knew. It was passive aggressive things like this that drove me crazy. I remember smoking in my room once and my mom walked by. She smelled “Smoke”. She knew I was smoking in there, but I blamed it on my radio plug. She was so adament about not having a confrontation that she called an electrician to check the wiring. Christ, that was more than you wanted to know, huh?
If my husband wasn’t on these boards, I’d tell you where I hide his Christmas presents…Hasn’t found one yet.
With my siblings, nothing I owned was safe. I got into the habit of hiding stuff in the garage under the lawnmower (until little brother got that job) or under the kitchen sink, with the dish soap. (Nobody else did kitchen duty, ever.)
At my oh, so conservative Baptist college in the early 70’s, contraband was in tampon boxes, sometimes slipped into wrappers that had been slit open spcifically to hide said contraband. I also has several shampoo bottles of bourbon.
This thread is better suited for In My Humble Opinion. I’ll move it for you.
Cajun Man ~ SDMB Moderator
Under my matress
Side of my bed
In a bag in my cupboard
Under my pillow
Bottom of a drawer
In a teddy bear