Do motor control drills. Give yourself a sequence of blocks, a la Dance Dance Revolution (up, down, left, down, down, up, etc.) and follow it as quickly as possible. Have a target number in mind, say, 10. Every time you make a mistake, start all the way back from 1. Next, give yourself a sequence of feints and attacks in the same way. Try and play duel or siege for 10 solid minutes after that. Do this every day and you'll get it in a week or two.