For my toe clips, I re-routed the strap so instead of going straight across my foot, its diagonal from one corner of the pedal to the opposite one. Then I leave it semi-loose.
I point my toes inwards to get in, then twisting my foot straight tightens them up. Getting my foot out at a stop is the opposite process, heels out and the rest of the foot slips out of the clip/strap easily.
Got the idea from 'PowerGrips' when I didn't feel like coughing up the money to buy their fancy thing... just modified my own toe clips to do the same thing...