I use reusable bags for shopping. When I forget mine at the store, I just push my cart full of groceries outside, load the stuff in the car and bag the groceries at home. I also stopped using produce bags a year or so ago. Unless it's something really small, like loose spinach or green beans.

There's a site that I want to start buying produce bags from called www.ecobags.com. They have small reusable bags for stuff like grains and produce, too.

I also stopped using plastic bags in my small garbage cans. We are required to have our regular garbage in bags, so I can't stop using them in our main trash can.