Find friends. Lots of friends. Your initial friend list is a good size but can always be larger.

Don't be afraid to comb through your friends plurks looking for active members to join your own network.

I agree with nkrahn. The more people on your timeline, the more exchange of ideas and information.

Go through friends lists and find the people with karma over 85 or so, check out their timeline and see if you like what they post

the idea of "collecting friends" This might be the most fun collection I have

DrBrandi: I agree with others - look for friends with your interests and that will add to your timeline