Stopping masturbation will expose you to significant health risks. I don't recommend any man abstain from Masturbation unless told to by his doctor. If you are determined to stop for whatever reasons you will want to make sure to compensate for body's natural functioning.
If you stop masturbating you'll want to adopt an aerobic routine to keep healthy heart activity and circulation, about a half hour a day should compensate for your refusal to masturbate.
If you are no longer ejaculating on a daily basis you will want to get regular prostate exams to allow you early detection of prostate cancer.
If you are not regularly exercising your kegel muscles through Masturbation you should consult a doctor for assistance in exercises you can perform to prevent erectile dysfunction and prevent urinary incontinence.
It is also a good idea to monitor your mood carefully. If you notice unusual swings or prolonged periods of depressed feelings you should consult a psychiatrist to get corrective help for the mood-stabilizing effects of masturbation that you are depriving yourself of.