How to get top ranking in google search engine?

[John M]

Search Engine Optimization.

The best way to get traffic from search engines is to have high quality keywords with little competition from other sites.
Research your keywords using Google's Adwords tools before publishing.
Also, consider the power of backlinks. Sites with more backlinks from high ranking websites have greater "authority" with search engines. You can have some success building backlinks by using social networks, creating blogs or Squidoo/Hubpages about keywords or using article marketing. Backlinks from related websites have more weight (my unofficial opinion).
Be prepared to spend some time working on optimization. Unless you get lucky with a certain keyword or phrase, it does not happen overnight.