first and foremost, it's not how much you earn. it's how much you spend. that's what they always say. but making a budget is so much easier if your basic pay is above minimum.
anyway, on my part, i start with my net pay for the entire month. next comes the itemized expenses. btw, your budget tells you the things you cannot affort, but doesn't prevent you from buying them. it all boils down to discipline.
once you have your budget, you distribute them according to your payroll period: in my case it is 15th and 30th. so, at one glance, you can have your budget for the month. and just a reminder, you don't spend what you don't have.
anyway, it's always better said than done.