A good advice to gamblers who wants to stop: use a software which blocks the sites where you can gamble.
I have tried for years to stop gambling but I just couldn't. I had no power to stop, I spent all my money, and everything I could just to gamble. Nothing helped.
Half year ago I found betfighter which is a program and it blocks those sites where you can gamble. This helped me and kept me away from gambling.
You can fin it on http://www.betfighter.com