Mostly, I just talk everybody's ear off until they decide to spare themselves and just get certified. This is how my wife, her good friend, and her good friend's husband all got diving and then, naturally, we've gone diving together.

Also, anytime I've done a course at the dive shop, I usually get a phone number or two to open our group up a little bit.

After I got certified, I went about 10 years before I went diving again, because I live in Northeast Pennsylvania and it's not like I'm tripping over other SCUBA divers wherever I go.