Read other users' journals and don't be afraid to post comments to their entries. That way, you can just click on your friends link and read what they are up to, and they will probably notice you're out there and add you to their friends list. Explore the community. Go to the community page and check out all the links. View all the communities that we have on LiveJournal.
Communities are like journals that multiple people can post to.
There are communities on tons of different interests, and representing different areas of the world. Not too shabby, considering we just created communities about a month ago. The more interests you have, the more people you will share similar interests with, and the more people will notice your journal. Also, make sure that you list interest names that are consistent with other people's names. They might notice you if you also have camping as an interest.