Getting Enough Done?

I am reading David Allen's Getting Things Done. I started reading it last night after spending the day getting a whole lot of things done. The reason I ordered it from Amazon is because I got an iPhone several weeks ago, and my husband, who knows my obsession with organization and could be mistaken for an iPhone salesman if you didn't know he wasn't, suggested Omnifocus, which is an organizational app. I love it because I can check things off a list, which is one of my favorite things to do. I will make lists just so I can check things off them. It works for me. Now my husband, whenever he needs something, tells me to put in in my Omnifocus. He knows I can't stand things moving from the "Due Soon" folder to the "Overdue" folder. He knows I will lose sleep to complete items on a list.

Omnifocus is based on David Allen's book, so I decided to read the book (as if I needed an excuse to read). I made it through to the first exercise which asks you to name the project on your mind the most. I, of course, wrote: Sell my manuscript. The next question asked what my intended successful outcome was, to which I wrote: I sell my novel to a publisher and establish a successful, profitable writing career. Last, Allen asks what my next physical action to move forward is. I wrote: Find an agent by sending out query letters.

I'm already sending out query letters, but should I be sending out more than five a week? I have already gone through the entirety of Jeff Herman's Guide to Book Publishers, Editors, & Literary Agents 2009 (Who they are! What they want! How to win them over!) with an orange highlighter of people who may be interested in my work. I have already gone through Publisher's Marketplace looking for the agents of all my favorite authors. And I already have a spreadsheet of my options started. So I could pump out more queries each week. The question is: How much rejection can I really handle in one week?