So, this feels like a good time to check in. I've been playing about a year now, entirely correspondence on OGS. I play a few moves each day, and try to always have 3 games on each board size going at once.
I still haven't formally done any study, but maybe it is time to change that (he says, again)

I've played 147 games of Go on that time (split between 9x9, 13x13 and 19x19, though initially I played 9x9 exclusively and they turn over faster, so a disproportionate number of those are small board), winning 111 and losing 36.
Although I have a policy of only challenging players with higher rank than myself (aiming at 1-3 stones, though some much stronger), that win ratio makes me think I haven't been aggressive enough in picking my opponents (I have failed at the "lose a hundred games as quickly as possible" task, but I will do "better" this year

).
I am presently OGS 9k.
I've read some books; Most recently Kageyama's
Lessons in the Fundamentals of Go, which I will no doubt read again. It gave me a few lightbulb moments about how to think about things (rather than any technical insight) and shone some light, and I think it's ideal for people about my level as I was feeling a bit aimless (still do, but it was food for thought).
Other things I read this year that helped a lot:
Bozulich,
The Second Book of Go - great orientation, "what the hell is going on?" kind of answers
Jasiek,
First Fundamentals - "here are some stupid beginner things, try not to do them"
Kano,
Graded Go Problems For Beginners 2 - immediately made me at least a couple of stones stronger, and the benefits accrued for a while afterwards too
I also want to point up just how useful Nick Sibicky's Go lectures are on YouTube. They are a great source of ideas that percolate around my head when I'm too tired or unfocused to read or play, and I feel like they've benefited me hugely. I think I've watched the first 40 or so.
Weirdly, I am presently feeling more at a loss than ever as to what to pay attention to. Now I have the outlines of (some of) the huge areas of knowledge that need attention looming like crags out of the mist, and I wonder which cliff to start on. Some options:
1. There is a copy of
Opening Theory Made Easy in my desk, that seems pretty friendly. I could just read that.
2. I still only know one joseki, and I get it wrong more often than not anyway. Kageyama's chapter was enlightening; don't study joseki as a series of rote patterns, but try and benefit from understanding the fundamentals of each one and why the variations are the way they are. That seems like it could be a fruitful avenue to pursue; what do you wiser heads think?
3. I feel like I only understand shape in a very crude way.
Shape Up! seems aimed maybe a little above my level but it also covers an area I feel really deficient in.
4. I'm not the greatest fighter in the world, though I'm getting better. Games at my present level seem to end up as brawls a lot, so that's an opportunity I suppose

5. I am also starting to really struggle with 9x9 (and to a lesser extent 13x13), which until now has been kind of a victory march. People in the SDK range seem much, much better than me at this form of the game. I think that probably gives me some insight into what I need to work on, but what?
The absolute right thing I know is to go and start on
Graded Problems III. But, you know. Other than that, what should I do? The world is my oyster but it's a big big oyster, and I feel like I could use some pointers.