1.You should have own a top level domain (Presently Blogs also) that too registered before 6 months.
2. Your major content in the site / Blog should be unique and not be copied from some other sites.
3. Content Quality should be excellent.
4. Your domain / Blog should contain a reasonable content that users might interested to read it,with out any under construction pages.
5.Your blog should not contain pornografic contents.
If you had passed the above conditions,then sign up for adsense(http://www.google.com/adsense)
