Don't ask why, just do it. Go to Technorati, search on some keywords that interest you--jalapeno peppers, gardening, strep throat, whatever--and check out some of the blogs that pop up with posts discussing your cherished keywords.
Read some of them--especially those not heavily linked to. Look for folks that resonate with you--read some posts, search their site, check out their archives.
Add three compelling new voices to your blogroll today.
Something to do with velocity and widening circles.