Just wait for few months and bookmark your websites pages and post blog or article but content must be unique and fresh.

To increase your page rank in google, you should do a SEO on particular page or website,
For SEO there is many ways to follow but mainly into content should be original, next keywords it should be more stronger and healtier.

There are many factor, inw which 2 main things.
On page seo and off page seo
On oage seo: Write seo friedly title, description and keyword. add internal link in new post.
off page seo: sharing latest post to High page rank Social bookmarking sites,
join dofollow forum like this forum, v7n forum etc.
participate in Social Networking sites like Facebook, Google plus, StumbleUpon etc
comment on others blog.
These thing give you good result in Search ranking.

having unique content and high page rank site backlinks definately help you to get good ranking in Google.

maybe not enough backlinks, did you do tiers link building?