[Jiganti]

If I know my opponent is solid, I quit. Honestly, I'm an extremely good HU cash game player and have the confidence that almost nobody at the limits I play can beat me, but why play anyone decent? I've always said that ironically the two most important aspects of heads up poker don't even have to do with actually playing. Bankroll management and game selection are in my opinion more important than actually learning the game. (obviously you have to be good to win, but you get the point)

if I feel that my opponent isn't making blatant mistakes, I'll quit. If I feel tired or tilted, I'll quit. I don't have a stop-loss limit because I quit when I feel my game is deteriorating, and I am very good at telling when I am at this point. I watched a friend of mine lose about 13 buyins once, ten another time, when he insisted he was playing his A game. Stop-loss limits are a very good idea, but if you're capable of telling when you aren't playing well anymore, then I don't believe you need one.