I can understand your pain I saw something horrible a few days ago. I still flash it from time to time in my memory I suggest a lot of distractions ala vidoe games and or TV or both at once

Only thing I can think of as well. That, or a sufficient large rubber mallet.

Good luck about the only thing that works is time.

Not time, aint no-one got time for that! D:

Forgetting? Nah. Memory doesn't work that way - but if it won't leave your head, the easiest way is to distract yourself with something that takes a lot of attention - often by learning a new thing. If you haven't got a project you can lose yourself in, learning a complex game like go/chess/risk works. So does attempting to learn a language, or putting all of your efforts towards creating a story or setting for something like D&D. Drinking's actually awful for distraction anyway - it may stop you from dwelling on something, but you won't be organized enough to move on - and there's lots of time for introspection when your motor skills don't work. Just don't dwell on the thing (don't actively try and force it out of you head, either - makes your stupid subconscious think there's something special about it and start analyzing it). Go do another thing.

2¢