Besides practicing the different types of casts to maintain muscle memory, practicing for accurate casts is also hellpful. Try putting some paper plates out at 15,20,25,30,35 and 40 feet, staggered from side to side, then drop your fly on the plate. Take it from those who have been destroyed by Denny's accuracy contest at the Idaho Fish-In, it's harder than you think. Once you can hit the plates, try tea cops.