...???... An out is an out. If you feel some of the cards that will make your hand will still leave you with second best then you simply don't consider them to begin with you (ie. a flush card that pairs the board). If you have a draw like a baby flush and you think that someone might have a higher flush draw your number of outs is zero. If you don't feel the cards you are drawing for will give you the best hand then you simply don't draw to them.
Sorry, DaNuts, but you are wrong. When you play poker, you always have to compare your hand and what your hand will be if you improve to the range of hands your opponent may have. You can never know, when holding for example, QJs with a 4-flush on the flop, that there is a higher flush draw out there against you. It's not a question of counting 9 outs or 0. If you are counting outs to determine if you have the right odds to call, you have to weigh each out by the chance that out will give you the best hand. If your draw is to the nuts, the outs have full value. Any draw that is not to the nuts has a lesser value per out. Since you can't see your opponents' cards, you can't count all or none.