One deals with jobs and appointments to be done that day. I always make the job list achievable for that day. As there is nothing more demoralizing than never getting to the end of a list. Fortunately I am time realistic and understand how long things take to do or travelling time to get to places.
My other list at the moment covers, future projects to do or objects to make. I refer to this if I have some spare time.
I have never, sat down, crossed my arms and said "I am bored", there is always something to do, even if you don't really fancy doing it. At the end of the day to look at the list and see it all crossed off in my book is very satisfying. Though I am very lucky to be my own boss and not have too many other people influencing my time. That comes with age....