I am going to give this some serious thought though - work out how much I need for bills, how much savings I'd like to put away for the year and how much "fun" money I really need at the moment. That should give me at least a ball park figure to shoot for every month. And maybe not even the entire thing in sales - if I know I am dipping into savings for a certain percentage each month that might also help me relax about how often I have to tap into it.