A bit of background: I started playing piano at Age 9 with a lovely piano teacher that I stayed with until I was almost 19 and moved across the US to go to college, so I had about 10 years instruction with the same teacher. She was wonderful, but I fear I was not so wonderful. I definitely became more passionate towards the last year or so of my instruction, and made it to about level 6-7 early advanced level before I left for college. I decided to pursue a music minor for about a month in my freshman year first semester, and a combination of high stress, a 20 hour course load, a terrible piano teacher, and sever anxiety, I decided to quit.
From then on, I only plunked at the piano when I went home for christmas and summer breaks, and even that hardly at all. Almost six years later at almost 25, I've been slowly re-learning the piano and I am at about the same level I used to be before I quit. I'm learning new chopin, schumann, and tchaikovsky at a glacial pace because I don't devote as much time as I'd like.
Oddly enough, I was always a terrible site reader and a good memorizer, and now I find I'm a pretty good sight reader, though not at the speed of any piano teacher I've known, and a terrible memorizer. I'm trying to build up my repertoire again.
The largest problem I've run into is my lack of theory and technique knowledge. My childhood piano teacher was great, but gave up on an unenthusiastic teenager that only wanted to play and did not want to learn the fundamentals of theory, my education is NOT GOOD for those. To my detriment. I'm trying to remedy that, but I'm lost as to where to start. I can play a song if you set it in front of me, but I couldn't tell you what key it is in unless it was in the title, and my scales are abysmal.
I'm also traversing this without a teacher, but I'm going to look into it once I move in about a month and have an actual piano to practice on.
And perhaps an unrelated note - I can't play a song unless I've heard it already.
So does anyone have any tips on how to increase my knowledge in theory and technique - theory especially? Books, videos, anything? Any help would be appreciated. I have a scales/arpeggios/etc book and I'm going to try to learn one section at a time, and get back at my hannon.