In terms of factoring bluff outs into your math, consider your chances of success.

eg.
vexvelour: 8 [img]/images/graemlins/heart.gif[/img]7 [img]/images/graemlins/heart.gif[/img]
Flop: 9 [img]/images/graemlins/club.gif[/img]6 [img]/images/graemlins/club.gif[/img]K [img]/images/graemlins/spade.gif[/img] (3 players)
You have 6 clean outs to your straight. However, if you are 100% sure you will win the pot if the flush comes and you bluff it, then you have an additional 9 outs. If you are at least 50% sure of your bluff, then you can count 4.5 bluff outs to the flush. You now have 10.5 outs, which is about 3.5:1 (instead of the 7:1 from your 6 outs alone). However, with bluff outs, you cannot rely on implied odds to turn a fold into a call, as you are looking specifically NOT to gain any more bets.

Of course, there may be times where bluffing is not part of your plan, in which case it would make no sense to calculate your bluff outs.