Video Games and Electronics:
- Kotaku - I've found that Kotaku is great for information about the North American market
- Siliconera - They tend to report mostly on games being developed in Japan, and a good portion of the games they discuss will never get licensed here; but it's nice to see the development of stuff we do get, plus look at the trends in general.
- Steam - You can buy tons of new PC games here, both from big studios and indie developers.
- Good Old Games - GOG is terrific for playing older/retro games, and has great prices.
- IGN - Not only great for video game news, but also pop culture in general.
Books and Popular Culture
- io9 - It has a little bit of everything, from current news to fandom-related discussion, to actual science!
- Goodreads - I get lots of book recommendations here; it's a great resource.
- Buzzfeed - This is the best time-waster ever. Period.
Toys and Figures
- Ever After High Dolls - This is a fan page, but the admin seems to be friends with people at Mattel and posts all kinds of leaked photos and info.
- Monster High Insider - This is a fan-run tumblr that is beautifully organized and full of comprehensive information with lots of high-quality pictures.
- I've subscribed to BigBadToyStore's weekly newsletter, which has lots of timely info about newly announced and upcoming releases
- I have "liked" the Facebook pages of HobbyLink Japan, the Good Smile Company, Kotobukiya, and Funko.
- Every now and then, I pop over to the websites for Toy News International and Action Figure Insider.
Anime and Manga
- Anime News Network - The best, most reliable source of information about anime and the anime industry that I have found. A very useful site.
- I have also "liked" the Facebook pages of FUNimation, Sentai Filmworks, Discotek, Aniplex of America, Viz Media, Vertical, Inc., Seven Seas Publishing, Dark Horse Comics. And their tumblr pages are very informative, as well.
