I just sent invites to those that posted on the main clan thread that we should connect to do story, nightfall, or vault missions. I always put Dads of Destiny Archangel in the invite body so they know I am not just some stranger. I have over 20 friends now...that is pretty good considering I recently came over to PSN from Xbox. Actually, I didn't have close to that on Xbox for that matter. The other thing is do your best and don't quit. Word will get around that you stick to the hard stuff and know how to play your toon. The next time someone you know is in need they will suggest you be added to the fireteam. The people you don't know yet will be impressed by your actions and invite you to be their friend. That has been my experience at least. Your mileage may vary.