Do what I did with the Boy and the Girl: take youself out to a quiet, straight road where you can expect no traffic to disturb you. Find a place with a rising gradient... not too steep, but enough to cause problems. Drive up the road, repeatedly stopping and starting in SECOND gear. You'll soon get the fine control.

Soon after that, gearchanging will become a reflex, you won't even notice you are doing it. You'll wonder how you ever drove an automatic- the ability to drop a gear and slingshot yourself around corners is just one thrill that opens up. Not to mention the fuel bill reduction.