If you are a knowledge worker (hint, you work at a desk most of the day or spend a good amount of time looking at your cell phone), then you are probably wasting time and letting people down if you don’t have this habit nailed down.
The habit is the daily act of prioritizing and using a to-do list.
If this is your habit you use it to establish other habits, build the trust of gettings things done with those you work, and overall crush productivity.
If don’t have this habit established, I recommend Microsoft ToDo; it is free, simple, and sufficient for your needs.
Of course, there are plenty of options for a to-do list, including pen and paper. If you already have something that works for you, I applaud in your general direction.
If you are wasting your time and letting people down, well stop it! And start using a to-do list.