Takeaway seems to be: stay light on your feet; keep everything in the short term, but build habits that will serve you in the long term; make sure you're always doing something that holds your interest.
http://somebeautifulplace.tumblr.com/post/6074297771/enhanced-autodidactism-for-the-chronically-lazy-and
Yes, make the hour count, but speaking as someone with a ton of experience with juggling I beg to disagree with your example. It is best to learn things in the right order. And yes, sometimes this does include making things more difficult intentionally. (I realize this was probably just a metaphor, but I think the point still stands.)
.