Tiffany Monhollon has a good post with 7 tips on making friends with bloggers, etc.:
The short list:
- Leave insightful comments on their blog.
- Write great content and link to them.
- Befriend them in their social networks.
- Communicate with them personally.
- Nominate them for awards (and tell them about it).
- Offer to work or write for them for free.
- Follow their advice (especially on relationship building.)
For details and more information, read the post.