I rarely drink or make my own coffee but I always have a pack of coffee filters on hand. In some cases, I can use them in place of a paper towel for so much cheaper! I buy mine from the $1 store for a pack of 1000. Here are some of the random things I use them for:

Cover your food in the microwave and save yourself from splatters.

Put a coffee filter in your cast iron skillet to absorb moisture and prevent rust.

Use them to clean windows, mirrors, and glasses since they are lint-free

Hot dog or taco holder. Saves me from washing another dish.

Put them under fried foods or bacon to soak up the grease