this all depends on a few things are you talking about clitoral stimulation or penetration with your fingers or toy?

1. if you are doing clit stimulation then you just have to get a rythem with your finger(s) or you can use a small vibrator on it

2. if your aiming for internal stimulation well again it's a question of speed and movement with either your fingers or a dildo/vibrator, try moving them around to get different feelings and see what suits you best! hope this helps Jenny