The other half of this (the "Most decisions will be easy" part) is knowing rough odds. Four to a flush on the flop? One in three chance of getting it. If a lot

The other half of this (the "Most decisions will be easy" part) is knowing rough odds. Four to a flush on the flop? One in three chance of getting it. If a lot of people are in the hand and the flush looks like it would be the best outcome, stay in. Same with an open-ended straight, and you should know whether others could have a better straight draw than your own. If you see a bunch of random crap on the flop e.g. no straight draw or flush draw or high cards? If you have high pocket pair or two pairs, get aggressive as everyone else is either drawing (and you want them under the profitability threshold of 3+ other players in the hand) or playing a hopefully lower pocket pair or very ill-guided low two pairs (so watch the big blind or historically loose players). You can usually calculate in your head how many of the unseen cards need to be somewhere to beat you: Suppose I have the best two pairs on an otherwise unspectacular board. My opponent needs a pocket pair to beat my hand. I have 8 opponents, usually a pocket pair is dealt 6% of the time. Even if I sum all the percentages---mathematically wrong but worse than the truth---it's less than 50% chance SOMEONE has been dealt a pocket pair, so I don't have to feel bad about staying in. If you can do this quickly and make it look like you are acting impulsively or inexperienced, more money will bet against you.