I reuse sandwich bags whenever possible. My husband gets all the coffee cans and margarine tubs for sorting all those little things he collects in the garage, screws, nuts, bolts, etc.
My kids think empty shampoo bottles are the best bath toys, and then they go to the recycler. The bottles, not the kids . . .
Any time we end up with a plastic water bottle, we reuse it for taking along tap water or other drinks on road trips.