I've been practicing the heel-toe method on a daily basis going to school and work but I have some questions. Sometimes the car would jerk but sometimes it wouldn't after letting the clutch out and I'm wondering is it because I'm revving too high or too low?..... or is it because I'm letting the clutch out too quick/slow? Or maybe I'm in the wrong gear for the speed I'm in? I really don't know because I just started learning how to drive a stick shift and I'm learning this on my own. How high do you guys rev for whatever gear you are downshifting to and is there a strategy to make it consistently smooth everytime it is done? What gears are appropriate for what speed? Thanks.