if i hit a significant downswing, 3+ buyins, ill usually stop my session and review my play. if i think im playing poorly, ill take some time to talk trouble hands over with poker friends or post hands here to try and find better lines to take, etc.. if all my beats are just suckouts or coolers, ill usually go back to playing. however, if i feel that i might be tilting at all, ill just go run/lift/do anything else.

another thing to note, you should always try to play your A-game. don't change the way you play just because you had a few losing sessions, and then once you win some back revert to your old style. if you think that you will win more consistently playing a nittier style, why wouldn't you play that way all the time?