For all the paper on your desk that never goes away and doesn't require action, put it in your "MTWGA" file.
Check the file every two weeks, either take action right away or toss. "MTWGA - Maybe This Will Go Away"
Do your 'to do' list for the next day before you leave for home. Check e-mail in the morning before you leave for work. Saves an hour of work starting your day. Face it: managing your time requires quickly deciding what NOT do to.