How to apply my knowledge of theory to guitar with limited practice?
Okay, here's the deal.
I've played guitar for 18 years. Just recently, over the last 5 years or so, I finally began to take it more seriously. I now know more about music theory and how it works with guitar music than at any previous point in my life.
The problem is: I only know all of that on paper. I have trouble applying what I know to my playing.
The further problem: I also have a busier schedule now than I ever have and my available time to practice is extremely limited. I can manage a half hour to 45 minutes a day, and I can play for more than an hour a couple times a week at most.
I can sorta read music. By which I mean I can't sight-read, but if you give me a piece of music and some time to work on it, I can learn it.
So, my question is: What can I do to help me apply my knowledge to my playing better with my limited time available to practice? I don't want to quit playing, but practicing more really isn't an option for me (I work 2 jobs and have a 2 year old son that needs to have his dad around). Getting kind of frustrated with the fact that I know so much more about playing guitar than I used to, and so little time to apply it to my actual playing.
It isn't the music reading I'm concerned about. I'm never going to be in a position where sight reading will be a necessary skill.
I'm primarily a metal rhythm guitarist, so playing linked 16th notes comes very naturally to me. It's a big part of playing rhythm guitar in a metal style.
What I was referring to is: I know how to figure out what key I'm playing in, and what scale I should use over a given rhythm part. But I have to do it after the fact by analyzing what I played. I can't for the life of me figure out how to do it WHILE I'm playing.
I can write music and compose stuff all day long, but I really suck at improvising in a free jam scenario. Which is weird, because most of what I write starts as an improvisation, I almost never plan out what I'm going to play in advance.
Mostly just frustrated that I have the knowledge, and I have the physical ability to play guitar. I just can't utilize both of those things at the same time.