[ZanC]

I kind of understand where tsu is at because I've been in for a long time.

I have to disagree with a few of the previous posts and common beliefs:
1. Mastering a build from a pro will probably let you win more games (ironically, usually up to Diamond), until you meet players who know how to beat that build.
2. HotS rewards aggression much more than WoL. In Wings, sheer mechanics and playing the "perfect game" is most rewarding - HotS is a different game however.

Also, to add something that many people don't talk about - focus on your understanding of the game. You can probably start thinking about and working on higher level techniques such as your Map/Space Control and your Information Game.

What the hero knows:
-What have I scouted?
-Will my opponent attack me?
-If so, what will I need to defend?

What the villain knows:
-What has (s)he scouted?
-Is my opponent prepared to defend?
-What attacks can I make?
-Is it worth it to make an attack?

I have found this especially important as Terran in the HotS meta-game because if left disturbed, Protoss and Zerg has faster macro tempo. Like many other , I felt it the most in TvP when switching from WoL; because of MSC.

All the best!