Can't sleep so i figured i'd pop on line and give a few of my own.
1. Cardboard packaging (backing, cig packs), and plastic packaging. Save them, can use the cardboard for taping small parts to for painting. And the plastic (if it's deep enough) can be used for mixing washes and paints. i have a whole drawer full of cardboard (somewhat of a packrat i guess.) 
2. Chopsticks and alligator clips. great for holding very small parts. Like in the plamo vids.
3. Pantyhose! Um...not to wear..(unless you're into that.......) I use it to strain old paint, that's still liquid. Take a piece that's slightly bigger than the bottle you're gonna put it into and hold it down with a rubber band to the threads. Then slowly pour the paint onto the stretched hose. I usually use a toothpick to gently push down on the hose while pouring, it creates a sort of capillary effect and the paint goes through and the junk stays out. This came from opening an old jar of Pollyscale it didn't work in the AB no matter what i did to thin it. In desperation (middle of the night, LHS is closed) i put thinner in the bottle to thin it all (about 3-1 paint to thinner), shook it up and tried the hose. it worked. And recently with my Renegade Krome, I've been having the same problem with my old paints, it works for me. Just be careful taking the paint soaked hose off the bottle...
4. Medicine bottle with dropper. Works great as a way to apply CA activator.
5. A Flashlight. To aid in your (more-than-likely futile) quest to save the precious innocent and fallen model part from the hideous carpet monster. With luck, you will wield a Flashlight with Blinding +3, so you can quickly rush down to the monster's lair, blind it, and locate the small defenseless part before it falls to a fate worse that death; Lingering quietly amongst other unfound pieces (and dropped popcorn) smelling your feet and laying just out of touching distance. Then once you've freed it, exit the evil dungeon and return to your forge and finish your glorious quest and bask in the praise of brother subscribers!
Ok, time for bed. Cheers!