I like GOOD; they have an email newsletter as well, once or twice a day about awesome things (bike vending machines! California taking steps to outlaw styrofoam! guerrilla pie charts!). posted by mlle valentine at 9:07 AM on July 21, 2011
My fave is KEXP's Song of the Day - free .mp3 download on a cool and (to me, ususally) new band. KEXP is the way I discover new music so I can use those brain cycles for something else. posted by cross_impact at 9:33 AM on July 21, 2011
Definite the Astronomy Picture of the Day!!! posted by Chocolate Pickle at 10:12 AM on July 21, 2011
I like Library Link of the Day. If you're vaguely interested in libraries but don't really follow any library blogs or that sort of thing, it's a one-link daily thing you might be interested in. I read a bunch of other library sites, but this one has been consistently good for almost a decade. Also +1 to KEXP and APOD both of which are consistently good. posted by jessamyn at 10:29 AM on July 21, 2011
Writer's Almanac. Every day is 5 minutes of a poem and some information about mostly literary events tied to the date. posted by jander03 at 12:58 PM on July 21, 2011 [1 favorite]
posted by griphus at 8:51 AM on July 21, 2011