Making some other motives and objectives in life will help,try to work only for them and transfer your all focus towards it.It can be studies,job,business or sports.Do something which gives you fun and pleasure and keep busy yourself busy in that instead of gambling.
yes if you really keep yourself busy in some other creative activities and from where you can really make money then surely you give up gambling for good, other wise it is not so easy to quit gambling for good.