Handy tip for keeping track of medicine

My family has been battling sickness off and on for two weeks now. I caught the brunt of it while in IL but didn't go to the doctor until we got back. She prescribed me a z-pack and prednisone. In order to keep up with "Did I take my medicine or not?" I wrote on the back of each blister the day to take each pill with a Sharpie marker. Simple, yet effective.

Note: I didn't realize until after I wrote on it that each pill says Day 1, Day 2, etc. I went back and wrote the correct day of the week. It looked messy but satisfied my by-the-book OCD tendencies.