I'm a sucker for cool Chrome extensions and when it comes to ones I use on a regular basis, Dewey might be my favorite.
Dewey was created by @YuriyYarovoy with a purpose of "turning your twitter bookmarks into something you will actually use".
It integrates with your Twitter account so that every time you bookmark a tweet it gets saved to Dewey as well. Within the extension you can then search your bookmarks by keyword, phrase, or even twitter usernames.
A look inside the app: