I have a 'fave' site that I play exclusively. I don't like having my bankroll spread-out over multiple poker-sites. However I do keep $5 or so on a site from a different network. When I feel the feeling you describe and still want to play, I just go to the site that I like less and play the $5 like I could care less about losing it. What ends up happening more often than not is that I actually do OK playing care-free and without concern for busting I regain that 'winning feeling'. When I feel like my head is in the right place I can go back to playing the site Im building bankroll on.