Big part for me was cutting away hobbies that didn't feel fulfilling anymore. So, like few others here, cutting back on gaming helped. I didn't completely cut gaming away, but i've started to move it from computer to tabletop, writing for pnp helps motivation, visualization and all.
Other than that love for podcasts help, drawing is nearly perfect companion, unless the show is too interesting.
Having an audience, any audience, motivates a lot.
Other art, speed paints, especially stuff that is completely different to working on tablet. Here's one really interesting one. Dashi Namdakov
And exercise keeps brain running, which helps motivation.