This may not be overly helpful, but hunker down and accept the fact that RNG hates you. I went into all my runs expecting to get nothing - so I wasn't disappointed when I didn't get the drop and I was happy when I did. It sounds corny, I know, but changing my point of view helped calm the rage of it not dropping. I started to enjoy the runs more because I was there to have fun, and less focused on the end drop.

Also, Netflix. Lots and lots of netflix.