According to a recent piece of LinkedIn mail:
Fact: Adding 5 connections makes you 3.7x more likely to receive a job offerOh boy! With odds like that, I'd be a fool not to make 5 more connections.
I'm going to start adding this signature to all of my outgoing mail:
Fact: Telling people about my blog (redditAll.com) makes you 3.8x more likely to get your startup acquiredBecause 3.7x just wasn't good enough.