What I do for this with my highschool bowlers, is you put a towel out on the lane just over the foul line. You fold it in half to get about 4-5 inches of coverage down the lane. You then go ahead and bowl like normal throwing your shots over the towel. This will get the ball out very quickly. If you want to start slow just put it on the approach side of the line as a mental thing more than anything else.