Cash

We have switched to cash for (at least) the month of August. We did this once before last fall and it was really a humbling experience.
We continue to use our credit card for gas purchases only. We take $100 from the ATM on Sunday and that is our allowance for the week. I need to plan very carefully when I grocery shop and prepare meals and also look ahead to any potential future needs (haircuts, DH lunches out with coworkers, emergency diaper runs, etc).
Luckily this time around, my pantry is more stocked and I pretty much can concentrate on buying fresh produce and meats instead of grocery items.

I like living on cash. We get entirely way too comfy with our credit cards. It gets away from us. Cash adds a bit of a challenge to our comfort of living. Who doesn't like a good challenge?

I recently saw this story on Good Morning America. It aired just days after I had decided that August would be a cash month for us.