To play Texas holdem limit one need not be a master in reading players about what hands the opponent holds unlike in pot limit and no limit games.  A basic probability idea will be enough to make some decent winnings; however, the one with the master reading ability will have a better edge in playing Texas holdem limit against those that do not know it.

Most of the Texas holdem limit games are better when played conservative and straight.  Though being conservative and cautious is a good way to play Texas holdem limit, being tight also equals predictable.  If someone is going to predict you that is one weak factor for your play in whatever limit or whatever category of play you are engaged in doing.

Definitely, you do not want to loose all your chills in Texas holdem limit or no limit or pot limit by playing questionable hands, you do not want to loose even a small stake in playing questionable hand, but when you are going to do it 99% of the time you become a tight and predictable player.  You will win, but winning might be small because you are too predictable for others to fold early without calling your bets.

When you play Texas holdem limit you must know when you should loosen up your game.  In any poker games there are going to be 4 kinds of players:
•    The loose player that plays lot of hands.
•    The tight player that plays very few hands.
•    The passive player that bets or raises rarely.
•    The Aggressive player that bets and raises very often.

However, whichever game you play the best way to start is to be tight and conservative in the Texas holdem limit preflop decision.  Loosening the play in the preflop is never recommended at all.  With Texas holdem being a lot of preflop play, you need to have a reason for why you have decided to play your pockets with reference to your pocket and your position by all means.

When you play Texas holdem limit you need to know the players at least to a certain extent to win.  Since bluffing does not make huge magic in Texas holdem limit, the need to know players is not a very high need; however, knowing them gives a better edge. However good your training has been there are many lessons in online poker that you will learn only when you pay your dues in the learning curve experience.