I hardly ever use cash. I probably spend $100-200 a month in cash, mostly because I don't like not being able to keep up with my spending easily.
I have a frequent flyer CC, a cash back CC and a 0% interest CC. It makes a lot more sense to use them, get the benefits, and have a record of what I spent.
I rarely use checks any more - never in stores - just for a few monthly bills.