There is very rarely anything useful in the TL strategy section.
For now I would just suggest focusing on improving macro/army control(decision making); and grinding a lot of games
If you really want to try to start learning high level builds/strategies watch GSL or streams of top pros (even mid level pros oftentimes have flaws in their strategies)
Other than Global StarCraft League, there's Major League Gaming (MLG), Dreamhack and Playhem to check out regularly along with Gom.tv. And then there's TotalBiscuit, HuskyStarcraft, Day[9], HDstarcraft and a ton more on youtube! Watch some casters, those guys really get your strat-work down. ESPECIALLY Day[9].