It's not that easy. I know you live with your parents so that's a pretty easy thing for you to say, but for everyone else, easier said than done to be honest.
I don't live with my parents and haven't for quite a long time and payday is pretty much an irrellevance unless it is something unsual (i.e. bonus etc). All my purchases are on card so that gets paid off once a month just like any other bill.