I've just started to read Order from Chaos, by Liz Davenport, and so far I really like it. Ms. Davenport has a 6-step process for getting organized, and Step 4 is "Make Decisions." To briefly quote from the book:
How many things can you do in a day? 10? 20? 50? If 190 requests are made of you each day and you can only do 20, how many times do you need to say "No"? Do you say "No" 170 time a day, or do you say "Maybe" or "Later" of "I'd like to someday"? Much of the clutter surrounding you is simply generated by those unmade decisions.
How many times do you pick up a piece of paper, look at it, say "I don't know what to do with this," and set it back down? The first time you have a piece of paper in your hand, you know 99.9 percent of the time as much as you will ever know about that piece of paper. So JUST MAKE A DECISION.