When I'm having nights like that, I usually quit for the nite. I can tell I'm not playing right and everything is just off. I'll usually spend some time reading up on poker strategy, cruise the forums, or look thru hand analysis and pick back up the next day. Sometimes, though, I just push thru to the next trny (I llike 9man SNGs), things pick up, and I take one down........and just keep going.....