Take your procrastination to the next level.
Coursera
Try taking some academic classes from the best sources in the country. Oh, and it's FREE!
Coursera / startups.fm
Instructables
This site curates a bunch of DIY tutorials for your everyday use. Finally, a place that gives you more things to pin on Pinterest.
Instructables / instructables.com
Duolingo
Actually learn a foreign language or two, because you don't remember shit from your high school Spanish class.
"It gets you to 1500 words which is somewhere between basic and conversational."
Duolingo / themetaq.com