How do you apply the mind-shift to projects where you have to finish something in order to advance? I have a couple of songs here that need mixing, but since th

How do you apply the mind-shift to projects where you have to finish something in order to advance? I have a couple of songs here that need mixing, but since they entered my to-do list, they are in procrastination realm ... But sometimes the thing you like is mostly about doing the thing and leaves little room for playing.