The continuing adventures of Joan wrote a novel

My eyes are spinning from all the reading on "How to find an agent." Today I put another notch on my looser belt of rejections. It has not been that many, so far about four, but talking about taking the wind out of your sails. I have pained over "How to write a query letter" to where I think I really don't know how. If I knew how then why wouldn't these people be bowled over by my exquisite example of a letter? I swear, I've tried something different every time.