how to SEO my Blog which is newly launched.?

[Doodled]

Well you can't be 100% SEO friendly unless you know the way Google and other search engines work - and that is top secret!

But you can improve the website to be more friendly and your website does have a long way to go:
I looked at this page on your site:
http://www.medwalls.com/2011/05/obesity-watch.html
- Your page URL doesn't match the content
- your title tag doesn't match the content
- your description tag doesn't match the content
- your h1 tag does not match the content

These are all things that search engines look at to try and gain an idea of what a page is about and your page tells them nothing really. Worse still because it doesn't match the content many search engines will be suspicious - are you trying to con them?

My suggestions are a tip on the iceberg but they will make quite a difference.

BTW - don't repeat your content in Facebook - Google hates duplicate content and that might be another reason for your woes.

See the link below if you want to find out everything you need to do to be search engine friendly.