1. The recording engineer's handbook
2. The mixing engineer's handbook
3. Reading your DAW's Manual INSIDE OUT!
4. Any professional gear forum...there are a ton (note: please search before you open your mouth on any of those forums and remove all doubt about your experience in the game. Some really big willies hang out there...and they get a bit grouchy with newbies. Your better off lurking and searching for answers to your questions..trust me ...it's probably been asked and answered 20 times already. Gearslutz.com is a good example for this)
5. Youtube ....Youtube? WTF? well...for example do a search on sidechaining on Logic and you'll find at least 20 videos showing you how to do it! The trick is in asking the right question in the right vocabulary.
6. Bob Katz' book on Digital Audio just for understanding the fundamentals of digital recording and reproduction.
I'm always looking for new info...new plug ins...new techniques. My education has not stopped nor will it. This is how you stay current. You are only as good as the research and answers you've exposed your mind to.
"you bust your ass to make all the money you can...thinking it solves shit...and then you realize..when and if you get there at all...you got more problems and you missed out on the one thing you can't buy or get back...your life! Spend time with friends and family...You can be broke in other ways too!...."