Tech Sites
Retail Assistance
http://camelcamelcamel.com/ (amazon price tracker)
http://www.retailmenot.com/ (always look for promo codes before you check out)
http://slickdeals.net/ (crazy deals)
http://gunbot.net/ (ammo price tracker)
Space Stuff
https://www.reddit.com/r/space
https://www.reddit.com/r/spacex
Futurology
http://nextbigfuture.com/ (future tech blog)
http://futuretimeline.net/ (a site with a hypothetical future timelime based on the trajectory of research today)
Linux References
Electronics and Radio Reference
http://www.radioreference.com/
Internet Bar Tender
http://www.webtender.com/cgi-bin/imbselect
Houston News