A sort of follow-up to the post about introverted people: Bootstrapper's Lab: Think first, talk later.
"It is very important to note that extroversion is a natural and healthy personality trait. However, it can be worthwhile for the extrovert to cultivate a few contemplative practices. If you're an extrovert, perhaps you've never considered how a rich inner life can bring positive benefits for both you and the people you care about. This article seeks to help an interested, extroverted reader learn how time spent in social relationships and quiet solitude can both be fulfilling." Take these steps: How to Be More Introverted if You're an Extrovert - wikiHow