My solution is walking while I read. As a result, I end up walking for 4-6 hours at a time when I have a lot of reading to do. My biggest struggle is finding good e-readers that can handle all the reading formats I need, sync annotations, and have good connectivity. Still haven't found one. I'm not sure they exist yet.

I also find myself saving things to read, because I struggle to read them while sitting, but never quite get around to reading everything.