I would definitely consider just trying to do anything to get that out of one's mind. Players that I run into all the time talk about their bad beats a lot more than any other plays, especially the good ones where they didn't suck out on another player.
If clearing your mind means getting away from poker tourneys or poker in itself for awhile, then you should do that. I've been away from the online poker scene for an extended period of time and only occasionally head to a casino for live gaming. I'm back to school and still have to pay off the remainder of tuition, so I'm not really much into playing.
Yet, I'm still attached and trying to improve my game. If you haven't done so already - to help clear yourself without getting totally disconnected, read poker books
. You can still become better without the playing time and possibly you can pick up some new tips and eventually a renewed desire to play the game.