Do yourself a note that will remind you of what you want to do.
We are human and are allowed to be. Humans forget stuffs and some are unable to remember no matter how hard they try.
When you have something to do, make sure to write it down so that you can start out right the next morning with thoughts fresh on paper like it was still yesterday.
Taking down notes has helped me a great deal. Quote a lot of times I forget what I planned to do from the previous day, but with the notes previously taken, I get to remember them.
Thanks for this @ejemai