The Writing That's Ready

I've got two picture books that I have queried a few agents about - but no one was interested. I queried a middle-grade novel I've written to another agent - to another no. I really think my query letters stink. I try to make them interesting, but I think of them like persuasive letters, which I was never any good at writing in school. Also, I have to sell myself. I couldn't sell water in the Sahara, so it's difficult for me to try to sell my own writing.

Oh, well. I'll just keep plugging away.