(To learn the 6 rituals ancient wisdom says will make you happy, click here .)

Alright, popular kid, we've learned a lot. Let's round it up and find out how to keep your new friendships alive over the long haul...

Here's how to make friends as an adult:

• The new starts with the old : Touch base with old friends and leverage your superconnectors.
• Listen, seek similarity and celebrate : Don't be interesting. Be interested.
• Be vulnerable : Open up a bit. Form an "if-then" profile.
• Don't be a stranger : Check in every two weeks, minimum.
• Start a group : Things that are habits get done. So start a group habit.