This website should prove to be an unbelievable resource for you if you haven't already discovered it. Any advanced Korean content you end up finding, you can dump in there, and highlight words you don't know (you can select Naver as your dictionary of choice, and the program will automatically look up each word's meaning for you -- or you can enter your own customized meaning if necessary). If the unknown words appear in subsequent texts you upload to the site, they will appear highlighted in those passages as well, "linking" them together and allowing you to see the words in different contexts.
I would also recommend you try to get your hands on some books on Korean linguistics written in Korean.
By the way, I am not nearly at your level, but I have a solid foundation in the language and want to have another "breakthrough" in my studies, which is going to require a more systematic, regimented plan.
If you have the time, would you mind helping me construct my own study plan that emulates the DLI program as much as possible? I know it's ridiculously intense (my dad graduated from DLI and learned Mandarin) and you guys studied like 8 hours a day, but I would at least love to have an idea of what you actually did during that timeframe each day (regarding content studies and drills implemented to improve listening, speaking reading and writing skills) so I can develop my own customized study plan that actually has a snowball's chance in hell of being effective. I'm particularly motivated to develop my listening and speaking skills, which still are mired in the beginning level due to lack of focused drills.
My goal is to start studying the language 5 hours a day during the week and 8-10 hours a day on the weekends.
If you can help, I would greatly appreciate it! 정말 감사합니다!
오늘 나는 올리브 가지와 자유 투사의 총을 갖고 왔다.