I can advise managing multiple projects because I haven't figured that out myself, but I have a small tip: You can probably quite easily squeeze in an hour or more of audiobook listening a day. I know I manage, and I have ten minute bike commute. But I also wash dishes, clean up the house and do lots of small chores. It has reached a point where I reach for my headphones even if I'm just going around the corner for milk.
And when I say audiobook, that includes MOOCs and other recorded lectures, you can access a wealth of free, university level material online if you want to move past popular science audiobooks or Teaching Company lessons (not that they aren't great).
And when I say audiobook, that includes MOOCs and other recorded lectures, you can access a wealth of free, university level material online if you want to move past popular science audiobooks or Teaching Company lessons (not that they aren't great).