While university librarians typically focus on the sort of information used in research, there are all sorts of information that we have to manage everyday.
A really useful article (filled with specific examples and directions) on dealing with personal information overload is Sara Houghton-Jan’s “Being wired or being tired: 10 ways to cope with information overload”, Ariadne, Issue 56, July 2008.
Maybe you don’t think you have an ‘information overload’ problem, but the article is still worth reading. Her advice is helpful. Especially her advice to just shut things off sometimes!