Just keep trying. It's a combination of luck and technique. After your ten millionth try you'll have the technique down pretty well, you just gotta keep at it. Eventually you'll get it and you'll be like "that wasn't even hard to do" and whenever one of these threads come up you'll be like "yeah I did it, it's not hard you guys." And no, it's not hard like winning at a slot machine isn't hard because all you do is pull a lever.