I have heard you should try to masturbate until you cum even if it takes hours. But man I don't have the patience for that which is why I relapse so often. I try to jerk off with my hands, I get hard but never cum, then I give up but having tried to jerk off I get really tempted to jerk off prone. If you don't feel like a week is a enough time I recommend trying to go as long as possible because if you fail at cumming with your hands you'll be tempted to go prone. At least that's been my experience.