Gather all of your plastic storage containers into one place. Start matching lids and bottoms. Put the lonely lids and bottoms with no mates out of their misery and recycle them.
Now toss the ones that have been used to microwave pasta sauce one to many times or that smell funny. Thoughtfully evaluate the number of containers you have and their sizes. Do they fit your everyday needs?
Do they stack or nest nicely together? If the answer is no, it may be time to say goodbye. It also may be time to buy new containers that stack better. Now pick a designated spot in the kitchen for the containers to live.
If they outgrow this spot, it's time to purge again. One last thought, you may only need 5-6 containers on a weekly basis but on special occasions like the holidays you may need a lot more for all those leftovers.
Consider moving some of your containers to a high, out-of-the-way shelf in your kitchen or pantry. Then you can get then down when you need them and not have about a plastic landslide every day.