I'm pretty lazy myself, but the lack of motivation can definitely originate from a heavy heart. Not so much the blues, but deep introspective music helps me feel better, too. I can't listen to happy music when I'm upset; it just pisses me off because that bubbliness is annoying at that moment, haha.

(If only I could slap some of those damn pop stars )

I find myself working on projects when I'm too restless to sleep, get motivation from a favorite song or when I'm getting thoughts of self-harm. My hair tie on my wrist "snaps" me out of the thought at that moment; the music, art and stories (I write) keep me out. When I'm anxious, I write it out. When I'm depressed, I draw it out. And when my mind haunts me with intrusive thoughts and flashbacks, I play music that eases my mind back to being mine. For me, it's about coping but it has changed me a lot.
It's more of getting yourself into that habit than having the motivation.

Also, really embarrassing, sometimes I have to make myself laugh and I'll dance at bizarre songs that I normally can't stand (I know "Best Friend" by Toy Box word for word and dance to that ****). It makes me feel silly and I imagine how I look in someone else's eyes. It's spectacular
When I'm adventurous, I'll do it in front of people.