Shyness is self-perpetuating. So start small, by doing something as simple as saying hi to people in an elevator (btw, elevators are a great place to talk to people, because they can't avoid you).

When you go to social events, go with a friend and make it a friendly competition to see who can meet the most interesting people.

Volunteer to do as many public speaking things as you can. And just generally force yourself out of your comfort zone. Reading won't get you very far, it's just practice practice practice.