I have a long checklist of things.

Inspect all the wiring and connections
Insoect receiver and antenna
Cycle the batteries TX & RX
Clean the fuel tanks
Check and replace fuel line tubing
Check engine bolts and motor mounts
Check the muffler ... is it on tight
Lube the engine (I use 50% air tool oil and 50% transmission fluid)
Inspect the prop ... also check for tightness
Inspect the airplane .... loose or tattered covering
Inspect the wheels ... also the retracts

How about the infamous flight box? Tools? Chargers? Extra Batteries? Glow Starter? Engine Starter? Supplies and Parts? Cleaning Supplies?

Geez .. this is getting to be a full weekend job!!