I use cash for the most part. It has lots of pleasant side-effects, like giving you a solid object that lets you feel how much you're spending, and impressing women (either the under 25 crowd, who like the look of the green stuff, or the 25-30 (now that I'm getting older) ones who look at you like you're obviously responsible husband-material because you use cash over plastic).
You are missing out on free cash using plastic. You need to eat, you need to pay bills, you need gas(assuming you own a vehicle). You are going to pay for those things anyway. There is no reason to not pay for it on the card , reap the cash back benefits and cash in when you need to. (i usually end up with about $400 or so for the year.)