I've been meaning to get to this for a few months. I collect used bags (baggies). Mostly the gallon size, occasionally the quart size, a few rare sizes in between. They can't have held meat or anything juicy. Most of them hold bread, cookies, or computer parts.
Saturday I finally got to the gallon jug I had overflowing with them. I cleaned out the kitchen sink and filled it up with water and a splash of bleach. Turned inside out. Soaked for 10 minutes. Rinsed. Soaked for 10 minutes.
Thrown out on the drainboard while I go shopping. When I'm standing around talking to my husband while he washes the dishes I'll turn them right side out and throw them in a box in the pantry.
Bags without closures (bread bags, oatmeal bags, grocery bags) either go in the dog-walk container by the door or drawer for garbage cans.
I still have and throw out way too much plastic, but I feel like I'm getting there little by little.