I think the first basic step is to become friendly. and later if you already have lots of friends try to participate any of their discussions to draw attention to your profile and then from their you can promote your business.
Use facebook,myspace,twitter give some time to make frnds and followers. give some creativity there......thats allo
Make funny posts... Status update can be funny. or you can make a fake girls account to acquire more and more friends.
Participating in Twitter chats is a great way to build up a list of social networking "friends." You can identify ongoing chat topics by their #hashtag. There are also several websites that list Twitter chats. Some go so far as to host their schedules and moderators.
i agree with all of the above be sociable and friendly and bring funny/interesting points to the conversation.
Make interesting posts. Promote your profiles on forums like this. Write interesting(informative) comments to other members' posts.
Try to make some groups devided by the interests and use them to attract new people. Get more friends in each group, so all in all you'll gain more friends.
Just be active, engaging and provide something that people are going to want to follow you for. If you are trying to figure out how to think about it, the article in my signature might actually be helpful. Basically, you just need to remember to be social. Contests and such are a good way to get more fans as well. Don't expect to just build your site and have people find you though. It never works like that. It will take some real sincere effort on your part.
If you are in FB have more friend request in, twitter follow many people as much as possible then they will follow you in return.
Be original, unique and engage the community! You've got to provide something of value if you want to make friends.
It's important to communicate with other members friendly and honestly. Comment on their pictures,notes and other sharings. Then people are more likely to accepting your friend requests.