Whether you are a beginner or an expert the right choice of hands is the important decision in preflop holdem regardless of limit or betting variations.  When the preflop holdem decision is made right, then the rest of the things might not be complicating.

In preflop holdem if you are in a favorable position, then without giving a second thought you will have to be aggressive. Going aggressive has a two way result.  One is that it will bring in more chips to the pot thereby creating a well built pot in cases where players are ready to bet.  In cases where they stop betting and they fold, it reduces the opponent number and you will have better information on who is your actual opponent.

Going aggressive in preflop holdem will pay you only when you are doing so with a solid reason to play.  You must be holding a hand that will play well with few opponents.  Some hands are played well with lot of opponents while some will be better when played with few opponents. Before deciding on whether to go aggressive or otherwise, you need to be sure of what next.

In preflop holdem unlike in many games regardless of you holding a big hand you need enough knowledge and expertise to make sure that you are not playing a second best hand, which means that regardless of you having a big hand since there is a better opponent out there your hand is already dead.  One should learn to identify dead hands, the earlier the better.

A solid set of beginning hands is the key to preflop holdem and without such it is going to be indispensable to make the show. Any expert worth a dime knows that the key to winning is to have a solid hand to play.

There is a limited number of memorization required in the preflop holdem unlike in calculating odds in a multi-way pots with the entire if, then, else, concerns.  As such for every variant of poker there is a recommended playable hand classes as strong, medium and weak.  A basic memorization of such charts will help one making a lot of better decision in preflop holdem without messing up a lot on details.   Also, blind defending games are very common in preflop holdem, which is necessarily a very basic and lethal mistake.  Never play to defend blinds unless you are very strong.