Today I found an interesting article on one -- it exemplifies the principle that if you want a really good explanation of something, you have to find someone to whom it doesn't come naturally to explain it to you. Therefore: Community Building for Introverts.
Also he made this form to carefully track progress in making friends (or work contacts, which it's geared a bit more towards). I can't decide whether it's slightly worrying or really useful... maybe both.
 "I'm not obsessive! And if you call me obsessive, I'll stalk you!"