I've really messed up on money this month!?

I got paid end of May and already I am br! I don't actually have anything. Barclays have charged me 3 days of �30 because I went over my overdraft! I have money going into my bank but it just takes 5 working days, it's rathe annoying! I went home for the weekend for the bank holiday and that's why I'm so skint, because I had a good time lol BEER!! Next month I don't want to spend my money on going out, but that's what I love doing, going out with friends and having fun! But I really need to stop wasting my money! What else can I do though coz I get rather bored sittin indoors all the time!