I think probably one of the most motivational things I ever heard was "If sometimes you feel like utter shit, just remember that Blood On The Dancefloor had to cancel their Australian Tour because they only sold 6 tickets."

Six. Six Tickets. 

I've listened to a few of their songs accidentally after I friend and I did a music trade back in 2011. 
It was awful, I hated myself afterwards, and I'm fairly certain if I had managed to vomit afterwards, it would have come out as a sentient blob with coon-tails and striped arm-warmers.