If anyone studies Korean and hasn't already checked out this possibly helpful blog, I encourage you to take a look at http://koreanselfstudyisntlame.blogspot.com/
Granted it is mine but there is a lot of helpful advice geared for people who ask themselves "what's the difference between 되 and 돼?" or "먼저 vs 일단?" or "동안 vs. 정도?" and the like. I welcome comments. Thanks!
Let's use this thread to add some more blogs if anyone else out there is learning Korean.