I love timers.  Something about knowing there is a finite number of minutes left appeals to my fickle inner child.  So, what can you do with a timer?
Fight procrastination: The procrastinators 10+2 hack from 43 Folders recommends setting your timer on a 10 + 2 round.  You work for 10 minutes, goof off for 2 minutes.
Boost productivity: Set the timer for a 15 or 30 minutes to focus on a task and commit to it completely till the timer goes off.  You’re only committing for 15 minutes.  Totally doable.  This also works …

Many years ago while in the middle of a mid-life crisis (I had them often in my early twenties), I decided to make a list.   The List.  It was essentially a to-do list on steroids.  Nowadays they come with pictures and are called vision boards.  But back then, I didn’t quite have that terminology available to me, so it was just A To-Do List.