For those who love to learn, Izotope has a new, free set of videos and practice games to improve your understanding of sample rates, EQ, and compression. While it is focused more on music production, these are essential skills for film and video sound as well.
Speaking of which, I just wanted to mention: If sound for film is your passion, you're sort of like a specialized ninja. There aren't a lot of us and we have to learn by translating what we can learn from a world where most of the focus is on music production. Good job, ninja. Keep up the good work!