Here are some of my favorite random things for oboe/bassoon:
Husky mini screwdriver from Home Depot (includes three flathead tips that fit the oboe, and the tips are stored inside the handle). It's also easier to grip than the ones that normally come with oboes.
Oboe Adjustment Guide by Bruce McCall - Has clear pictures on every page and isn't confusing. :)
Nylon thread from Hobby Lobby
(cheaper than double reed shops and lasts forever)
Collins scented cork grease
Parafilm tape - translucent stretchy tape that only sticks to itself. Good for sealing reed leaks in a pinch, and looks better than teflon tape.
Adjustable music stand shelf - holds your reeds and tools during rehearsal
I have a black fan that blends in during concerts and helps cool me down under hot stage lights.
Vandoren Reed Resurfacer and Stick - This is an etched glass rectangle and stick used to adjust/sand reeds. It is reusable and washes with soap and water.
Tupperware "Midget" cups - these are great water-tight cups for reed soaking. I have gotten several on ebay.
Magnetic reed soaking cup - I don't know what I'd do without mine
CRKT Ruger Folding Pocket Knife. This knife is awesome for reed adjustment and has a black blade (blends in on stage).
Cleartune app - I use this tuner on my phone
OCB non-gummed cigarette papers - gets water out of the pads and tone-holes.
Aquarium tubing to keep English Horn reeds on the bocal (double reed shop tubing is the same stuff, only more expensive)
Black padded cosmetic bag - When directors tell double reed players to leave our cases off stage, we still have tons of stuff we need with us. This helps hide our swabs, tools, extra reeds, etc. on stage.
Grunwerg Mini Thermos (200 ml). The smallest black thermos I could find - I bring hot water for my reeds and it stays warm for hours.
O2Cool necklace fans - good for outdoor performances (the black blends in)