Tim Corder wrote a great post about this a few days ago. I've tried and I can't come up with a better way to say it, so I'm just going to link you to it. He terms it a "rant," and in some ways it is, but he's so right on with what he says.
Whether you have been mixing for 20 years or 20 minutes, you have something to learn. To not learn more, to not continue to hone your craft is a real shame. Someone famous once said, "If you're not learning, you're dying." That is so true in our business.
After almost 20 years of live sound mixing in one form or another, I still find myself learning new things on almost a weekly basis. In fact, I think I've learned more in the last 12 months than in the 5 previous years. Why? Because I keep reading, trying new things and most importantly, listening. Listening to music, good mixes and others who know something I don't.
If you don't know what something does on your board or in your rack, learn what it does! Today it's way too easy to learn about the equipment we use to say "I don't know..." Look it up on the internet, ask someone else or just play with it (not during a service please!).
Anyway, here I am adding to Tim's thoughts. Just click here and read for yourself. Happy Mixing!