Have a favourite snack or beverage? or internet site to surf?
Allocate one of these for each important project completed.
Write down the list by priority and reward.
I am here posting AFTER practicing two rounds of Amazing Grace on my chanter.
A good round of one of the tunes that I need to memorize for class, and a simple pleasure, then back to the work. It gives the brain a chance to store and defrag the last project and clean up before the next.

Slainte