[fho]

> 2 - Invite people over for dinners

Or other social activities/hobbies. I guess that's why board games are so popular, they allow you to have social interactions while following a very constrained set of rules.

edit: I shouldn't leave this uncommented:

> 5 - Learn to listen.

This! People want to talk, people feel good if they have the feeling that someone cares for them. Just listening is a great way to make friends.