My Best ReUse Idea

My best reuse idea was started 20 years ago and it couldn't be simpler. Replacing paper napkins with cloth napkins purchased at the local thrift store. My napkin collection has grown more colorful over the years and is still very economical. Twenty years ago, napkins were 4 for $.25. Now they can be found 4 for $1.00, which is still a great deal and saves on waste.
Now the only challenge I have is when family comes over and brings their own paper napkins because they don't want to dirty mine up. I know, baby steps....
What your best ReUse ?