Crochet tote bags: They're water proof - great for the beach.
They're strong - I use them for grocery bags and library books.
Outdoor holiday decorations: Crochet an angel out of white bags, the plastic holds
the shape and it will look great topping that evergreen tree out in your yard.
Use orange bags to crochet pumpkins for your front porch, they're safe from
the weather when you stuff them with plastic.
Crochet a welcome mat for that front stoop.
Crochet a tub mat.
Crochet a clothespin bag for the laundry line.
Crochet a slipper to cover that cast or ace bandage on a sprained ankle.