It is a good suggestion to distract your mind by some positive activity. It is true masturbation done in limit does not harm, worrying about the habit does more harm. Try to avoid mb. If you have to do it, following the following tips. Mb with lubricated hand, do not stop breathing while mbing. Relax your perineum , empty your bladder before mbing.All tips are helpful in doing a proper masturbation. You cannot supress by will power only. You learn abdominal breathing (google) practice it twice a day for 10 miniutes. Use this to distract your mind from mbing.Search some breathing exercises to improve your blood circulation of your groin ares. Diligent effort will help you to improve your total life.
masturbation will not cause any harm to your body ,it is the safest form of sex, noone ever has got an STD from masturbation .but excess of masturbation is not good for health
tryto mingle with other people
grow your intrest in something else like music or art or dance or whatever talent u have
engage in other activities like sports or games . i think that'll help