I really prefer the flat slide switches that mount on the outside of the aircraft. I set them up so that pushing them towards the rear of the aircraft turns the power on. Being flat, they can't be turned on or off by bumping or brushing the fuselage. I also use Voltwatch and put it in a visible location so that a quick glance, lit LED's mean the power is on.

And, before taking off, wagging the ailerons to verify that it is indeed turned on.. helps too..

CGr