Authority site

I am just planning to start authority site. So, how should i start it
shall i cover all types of nich or particular ?

shal i choose domain name base on my name or any other?

I am planning to take my country domain (com.np)

Hi,
1. Try to get niche related URL name (Not Compulsary).
2. Update Useful information with Unique Article.
3. Get some Qulaity backlinks to your site.
4. .com is best..so np
5. General niche or particular niche thats your choice..

Check out this thread:
http://www.blackhatworld.com/blackhat-seo/making-money/443367-faq-how-i-build-rank-monetize-authority-sites.html