An easy way to learn how to clip in even under pressure is to put a foot down at every stop sign (yes sign!), light, anytime you have to stop. Yeah it kills your average, stopping might save your life, yada yada yada, but in the end, you'll race better because you practice clipping in a few dozen times a ride. After a few weeks of this, you'll clip in as fast as humanly possible without thinking about it.

Then you can work on your trackstands.

cdr