As with everything in life - with practice. There are no shortcuts without actually meeting people. He only advises a lot of simple strong points to actually think about which ones we want to attract and how to prepare ourselves to lessen the possibilities for rejection (not stopping it, since it's completely normal to be rejected, since you can't be compatible with everyone). It's all well laid out in the Models book.

Now I don't mean to spin all this around about the book, so I'd suggest reading through his blog posts, perhaps starting with the "best articles" to get an impression of what he's about. I'm positive that someone open minded enough will get something compelling out of it.