Another important dynamic of bankroll management along with, how much of it should be in play at any time, and what tables you should play at based on the size of your bankroll is how much you should allow yourself to lose at any one sitting.
This is summarized from an article by Annie Duke:
"When I first started playing poker, my big brother gave me a great piece of advice. He told me to never lose more than 30 big bets in a game, give or take. That means I shouldn't lose more than $180 in a $3-$6 game, $600 in a $10-$20 game and so on. What a great piece of advice that was, one of the most important he ever gave me for money management,...
...One thing the 30 bet rule does for you is limit your losses in games where you might be the sucker. Until you are able to accurately judge how you play compared to others in your game, loss limiting with the 30 bet rule effectively stops you from dumping off large sums of money in games you may not be able to beat. This is always a good strategy for bankroll health!...
...When you are losing, your table image erodes and table image is very important to how much money you can take out of a game. Other players are also more likely to play hands strong and fast against you, bluff at you and generally will be more likely to run you down which will take away your ability to bluff. All of this really eats into your earnings....
By limiting your losses to 30 big bets, you are effectively minimizing the time you spend playing with a poor table image, playing passively, or steaming at the table and maximizing the amount of time you spend playing your A-game. If you don't go beyond 30 big bets, you won't dump off large sums when you are playing poorly or are in a bad game and might not be able to soundly assess your circumstances. Loss limiting acts as an objective stop-gap...."
I have taken this to heart and assure myself of the 30 bet limit by not coming to the table with more than that amount. I'm not the most disciplined poker player in the world or Cardschat for that matter, and I probably lose more than I win. But a $30 deposit now lasts me a month rather than an hour. The dollar a day I lose is well worth the value of the entertainement I get in return.