You can collect whois data of the daily regisered domains.
Then make a some tools like SEO tools, top 10 survey, automatic voting system.
Email the domain owners about you tools.
I hope they will look your blog regular basis to see their progessive in case of SEO tools.
Again if you can make a voting survey system, the top voted item/person will automatically in pos no.1 then this might help your blog running autopilot.
Best of luck.