Recycle the plastic bags. Many thrift stores will re-use plastic bags for their merchandise. Some department stores and grocery stores will also often have a location where you can drop off clean and dry your plastic bags to be recycled.
Re-use the plastic bags yourself. Think of creative ways that you can use the bags to save you money or time, or be fun! For instance, plastic bags can be used as small garbage can liners, going to the pool, or even plastic bag art projects!