sometimes i'll hop my rear wheel to bring my cranks into a more comfortable (dominant foot higher) position. but that takes some practice.

think of trackstanding not as staying still, but as keeping opposing forces in tension, in equilibrium. there will be a consant give-and-take--i'm usually rocking back and forth, sometimes a little, sometimes a lot.

but mostly it's practice. on your way home today, just noodle around for ten minutes before you go inside. then do that every day for several months, then you'll be able to do lots of neat stuff