Tactical opportunities that occur all the time are important. Even when the amount of money attributed to a wrong decision is small, it will eventually add up to a tidy sum if that error is made frequently. Always defending your small blind in Hold’em, for example, is a good example. You have to decide whether to defend your small blind every round — and that’s frequent. If you always defend it, you are investing part of a bet on those occasions when it is wrong to do so. At the end of a year, those mistakes add up.
