Essential Stuff
WD-40, every RC man should have some of this in his tool box, just oiled almost every moving part in my rustler; and it's like driving a new car
A power drill that can accept sanding bits and has variable drill speeds, sped up the process of modding the chassis and unscrewing the screws to oil so much easier.
A good charger, really speeds up charging, rather than waiting overnight for a batt to charge. It takes only 45 minutes
I'll keep y'all updated, remember to email me for more ideas for this list.