Remember when you first started to play no-limit hold'em? During those first few sessions — whether live or online — did you appreciate just how complicated a game NLHE really was?
Chances are you did not. After all, the rules are relatively easy to learn, and it is even possible to do reasonably well with just a rudimentary understanding of no-limit hold'em and a tight approach from the get-go.
Eventually, though, most players come to realize there is more to the game that simply catching cards. New players especially can fall into bad habits if they continue to play without being mindful of strategies that can help them increase their chances of success.