So not so long ago when I first met my boyfriend, now current husband,  introduced me the idea of keeping a budget. He setup a really easy to follow spreadsheet where I could enter each day what I spent and setup an estimate as to what I would spend on rent, bills, food and, of course, fun! After a month, I was amazed I was spending over a thousand dollars on clothes and fun. I wasn't going out and buying a couple really expensive items but it was all the smaller stuff that just quickly adds up. I must admit I was completely shocked and afterwards definitely felt like I had really had nothing to show for the money spent.
Well, lesson learned, I continued to use the budget sheet, just to keep my spending in check and was eventually able to start saving a lot more each month!