All of this I found essential at the regional competition, or at one point really wished I had brought:
-Machinery's Handbook
-extension cord
-colored sharpies (for scratches on painted parts)
-flashlight
-small broom and dustpan (or better yet, a shop vac)
-extra long zip-ties
-7.2 V backup battery charger
-extra tether cables
-paper towels
-bottled water (the team will love you!)
-Lexan sheet assortment (to cover up vulnerable components)
-First Aid kit
-1.5" hole saw (hopefully you will never need to use this, but if you are over 120 pounds...)
-SCHOOLWORK
Have you hugged your programmer today?