My favorite practice (and one of my better memories) is doing landing practice. My memory came from a Sunday morning with this guy. It was dead calm with a low (like 300 foot) ceiling. Back and forth...go touch the cloud, come back and land, keep going, touch the cloud on the other side.....then throw in a buddy's plane just so you can have fun with each other. THEN throw in some hammerhead practice for the turn-around.......