Never chase potentially losing hands
An error often made in limit hold'em is to continue to play a hand with little chance of winning even if it becomes a better one. Similarly, waiting for cards to create apparently good hands but risking that the opponents obtain better hands is another serious mistake.
If your hand is tied in some way with the flop, it's easy to get caught in the pot. Sometimes you will end up playing hands like Q-9 after a flop of 9-J-3, perhaps thinking of having the best hand.
But even if your hand were to improve, for example with the arrival of a queen on the turn or river, this may have helped someone else even more. If one of your opponents have K-10, the woman has done to scale, who will have QJ for two pair of your best: two scenarios that cause you to lose a lot of money.
Similarly, expecting a card to bind the minor scale as possible (for example, having a 3-4 hand on a flop 5-6-x) or even chase a flush with low cards could get you into trouble. Furthermore, if the board is paired chasing straights or flushes may be a mistake, because some of your opponents may already have a full house.