One of the most wonderful and frustrating things about writing is that I'm always learning new things. This is wonderful because I love learning new things and because I always want to be a better writer. By "better" I mean have more tools in my writing tool box than I do right now.
But it's frustrating, because I never hit a plateau. When I learned something in school, I had some time to integrate what I'd just learned into my life before learning a new thing. I don't get that anymore. When I read other people's blogs on writing, I learn something new every time. Something I can apply to what I'm currently working on. Something that I need to go back through my current WiP and fix.
Then, while I'm learning this thing, I learn something new. Or discover I'm still struggling with one of my old problem areas. For me, this is show vs tell. Can't I just learn this one and move on already? No. It is a constant struggle, with everything I write, to show vs tell. I've gotten very good at telling in a showy way, but it's still telling. Now it's just harder for me to find.
But when I do learn it? Wow! I'll be a much better writer!