I think it depends on why you see SPs.
If it's cause you're lonely, get a girlfriend.
If it's cause you're just horny all the time, try to jerk off instead.
If you're like me and do it for the variety, try to avoid logging onto sites like this one and erslist/backpages/etc. Browsing online exposes you to many different SPs which can be very tempting.
Maybe try setting a firm budget. If you want to see an SP every other day ($240 X 15 = $3600 per month), try setting a budget of around $1200 for the month and don't let yourself go over.
Also if you're paying $240 per session, I assume you're doing 60 min sessions. Try cutting down to 30 mins.