What to add to my studies / practices?

Have dropped off of LoA a bit in favor of doing slower, more careful studies and finding methods that work for me, with a small amount of success!

I've filled several sketchbooks (as well as practiced digitally again), and I'm working on learning to design things that I feel are a ways out of my current skillset (elaborate machines, for example), but I'm not sure what to do to further my studies when it comes to drawing people.

I've gone through Proko's courses, as well as Anatomy for Sculptors and Figure Drawing: Design and Invention, and while I'm practicing things from those still, I feel like I've fallen into a bit of routine, and I want to add more variety to my practices. I have tried Draw A Box and found it wasn't a good fit for me.

Ideas? Thoughts?