The best remedy I know of is to keep very detailed records of your play. I have been keeping records of where I played, the game, the stakes, and results for almost 10 years. Last year I started off losing, it was pretty brutal, and it lasted for a few months. I didn't change a thing, because those records tell me that I am a winning player. I didn't question anything, and knew that all I needed to do was keep playing. By the end of the year, I was well ahead again.

These records also showed me that as much as I like it, pot limit hold 'em is not my game. And, btw, neither is no-limit cash hold 'em. I like both games, but over the long haul, I am a loser at them. I have fared a little bit better in tournament no limit, but my bread and butter is limit hold'em in the $10-$20 to $20-$40 range. I have averaged +2 big bets per hour at these levels for a long time.

BTW, it is also a good idea to drop down a level when you are running bad for a prolonged period. A few sessions at a table where you know you are well ahead (expectation-wise) never hurts.

Also, don't kid yourself....if you are not positive that you are indeed a winning player over the long haul, then you probably are not. If that is the case, get some books, definitely drop down and fix the holes in your game.