In reply to bigbadsquare:
the 3 P's of good footwork for beginners: Position, Place, Push.
Look at the position/hold you want to get your foot on to so that you can make a deliberate move to it (and not just scrape around til it sticks on something).
Aim to place your toe/edge/heel on there first time, to avoid wasting time, energy and your expensive rubber.
Get your centre of gravity sorted (a whole nother thread) and push off from it to support your weight.
This is something simple that I was taught very early in my climbing and it helped greatly in using my feet effectively rather than relying on my massive massive guns!