Ask HN: Besides HN, What Sites/Blogs Do You Visit Daily?

For fitness:

http://www.reddit.com/r/fitness/ http://stronglifts.com/forum/

For design:

The Register [http://www.theregister.co.uk/]

discussion by recovered and recovering sysadmins [alt.sysadmin.recovery]

You should try these - Mashable, ReadWriteWeb, Daring Fireball, Slashdot, Coding Horror, Venture Beat, Valleywag, Digg Technology section, ARS Technica, Joel on Software, A List Apart

http://www.marginalrevolution.com is brilliant. Also try Delicious.com, Popurl.com and Slashdot.