I am not a fan of plastic bags, not only are they not good for the environment, they are a mess to have around the house. As much as I try to remember my reusable ones when I go to the grocery store, I have many times that I forget and end up with a bunch of plastic bags. They can be bulky and a pain to store, but they are good for sack lunches and dog duty. My Mom taught me this great trick which helps store your plastic bags without taking up a ton of room.
First, flatten your bag, then fold it in half twice. Next, start folding it in a triangular pattern, until you reach the end of your bag.
Easy to use and easy on the eyes!