I use coffee filters instead of a plate or paper towel to serve snacks to the kids. They are the perfect size and flatten out into a round shape easily. I picked up a huge unopened bag of coffee filters at a garage sale for $1. I think it was 600 or something like that. Since my husband is the only one that drinks coffee it would take I guess two years to use them as just coffee filters.
I also put the filter plus coffee grounds in an old coffee can to take to the compost bin. I just throw it all in. If it is the time I am taking it out I also take the leftover coffee from the pot. If you are storing the can don't add the liquid unless you want moldy compost.
Get more tips at Tammy's and Diary of a Stay at home mom.