Creating a task manager / TODO list made all the difference for me, for the simple fact that marking things as DONE provides a little dopamine. Over time you positively-reinforce yourself to do more things to get more magic checkboxes.

I try to keep everything in there. Of course I have my daily routine, project goals, scheduled events, people birthdays, etc.. But I also have things like vehicle maintenance, system maintenance, chores for home, and stuff like that.