<prompt> Human: Im 21, starting my senior year of college, and Ive been working since I was 16 but Ive never really been able to save up money, and I could never figure out why, until now. At the urging of my very-good-with-money boyfriend, I got a credit card to build my credit score, because my 19 year old car doesnt have much life left in it and my parents have terrible credit so they wont be able to cosign anything.I didnt go wild with it, only using it to buy things I would have bought anyway gas, coffee, food, etc. When my statement came in I was shocked- I had somehow spent 550 in a month, with no purchase bigger than 65 for a school fee. No wonder Ive always been broke, holy shit. About 200 of it was gas, which is much higher than I thought I spent on gas, but I guess its unavoidable. How the hell do I cut down on the rest? I need to stop hemorraging money! Ive always gotten by but Id like to start moving towards comfortable adult with at least some savings. Thats on top of 350 rent, 80 utilities, and whatever I paid cash for, which I have no idea of. I make between 250-300 a week plus cash tips 75ish a week. Help!  <response>: Get yourself a budget. Mint.com, YNAB, or one of the spreadsheets in the FAQ. 