Manstein's revenge:
What one tip, tool or technique have you picked up over your modeling lifetime that has radically changed the way you model (for the better I hope)?
One thing, eh? Has to be the Mattel Vac-U-Form machine... Never do I suffer from bad/broken canopies, missing gear/bomb doors, seats, parachutes, ammo boxes and crates, SMG and assault rifle magazine pouches, hatches, a lack of Kevlar helmets or camouflage-covered German helmets, the list goes on and on...