You were supposed to have fun in your work.
When you diminish it just to end goals (which are important too), you are never living ever. You are postponing fun to tomorrowland.
Let us say you postpone fun to weekends and then actually have it. But then your mind will be again stuck in hoping to get to another goal over the week/when you get back to work.
All work, hence, should be boiled down to one common mantra: Have fun today.
How you do it is something you already know. It was the “fun” element that you needed the reminder to.