When i was new to blogging i found out some pinging services which helped me a lot to reach my audience. You just need to post ur updated blog posts and they ping all the search engines

http://www.ping.in
http://pingates.com
http://www.pingoat.com
http://feedshark.brainbliss.com/
http://www.blogpingtool.com
http://pingler.com
pingomatic.com

Hope this helps.
Anita
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