HNsearch.com, Topsy.com, pinboard.com, stackoverflow.com, getprismatic.com, subreddits for specific topics.

Sometimes, delicious.com, which i used to go every day.

subject matter specialists on twitter,

______________

If i'm not researching something:

I open chrome and firefox pages to manage extensiosn/addons and those are the only pages i let myself open (my version of no-procrast)