Blogging is the best way to promote the website. Writing the blog has 2 main benefits:-
1) Blogs provide a way to interact with people/user by providing information to them. Posting latest information and facts will give them a reason to keep returning to the site.
2) A regularly updated blog gets crawled regularly, hence increasing the page rank. To keep the visitor coming back to the blog, create interactive content, infographics, video tutorials, facts, etc.
Submit your blog in blog directories and blog search engines. You can also ask for a guest blogger to write for you. Guest posting on other blogs and leaving backlinks can also help to improve ranking.
List of Blog Submission Site:-
a) blogger.com
b) tumblr.com
c) weebly.com
d) livejournal.com
e) sfgate.com
f) academia.edu
g) reddit.com
h) diigo.com
i) newsvine.com
j) evernote.com
k) quora.com
l) squarespace.com
m) hubpages.com
n) blog.com
o) shutterfly.com