When you are figuring out your pot odds leading up to a decision in a poker hand, how do you do it? Do you figure out what your odds of winning the hand are by counting outs, then figure out how much money is in the pot and how much you are being asked to call, and then compare the two calculations? If you are, you are doing it right, but if you add a third step of factoring in what you have already invested, you are heading down the wrong path.
It is human nature to calculate how much they have invested in something. We want to know what our Return on Investment is going to be: great, you won $1,000 - but if you invested $999 to win it, it isn't much of a victory, is it? That's fine to do, and in fact is a required part of decision making in poker (you wouldn't call a $999 bet if all you could win is $1), but it has to be your investment of the moment, not how much you already have in the pot.
If you start factoring in how much you've already invested, you put yourself at risk of making the wrong move for a silly reason. If all signs point to your bottom pair being beat, there is no need to call that bet, regardless of how much money you have in the pot. On the other hand, if you have a royal flush in a Texas Holdem game for example, you call anything you want. Otherwise, keep your already invested money out of your figuring.


