It has helped me a lot to do 1 min gesture drawings... and in top of some, make tiny studies of muscles, basic anatomy. You can make 40 mins daily. Or less. Like these:
Although I have to say I'm now more interested in stylized stuff than realistic, but you're right about knowing the "rules" in order to break them. Helps a lot. And I have to admit... it's been a long time since I studied properly D: I feel the rustiness. Just stick to study daily. You'll do greater!! Cause you already do great :D
RE: Remembering where I started from