It's something that I picked up from a friend at college a few semesters ago. At first I thought it was the normal 'handshake after first time meeting someone kind of handshake', but I soon realized he used it very frequently with people he knew, including myself. The feeling of closeness and that my conversation was valued made metry to copy his technique. I use that technique off and on, but I like the fact that it firmly ends the conversation so that I don't ramble on. And although I'm not that fond of touch I've learned to endure it if a handshake can give a sense of connection and friendliness beyond the usual withdrawn and distant conversations that are my norm.
Anyone else strategize their handshakes beyond the formal first meeting handshake? Or use some other method to try to connect beyond words?