What is the best way to optimize the site laying?

Question

Search Engine Optimization

The site domain of the same name in the .com zone corresponds to the RF query.
The site is self-written, from scratch, because almost nothing is required. PHP form and several html pages.
The site will include the following pages:

• Home page twitter widget
  
• Several articles on the topic
  
• A small form for feedback
  

In the top of Google for high-frequency and low-frequency queries, the Vkontakte group is in 1st place, and the article on Lurka is in 2nd place.
Never did optimization as unnecessary. Articles on the Internet for more or less large sites.
How difficult is it to "overshoot" VK and Lurk? What are your tips?
Ideas come to mind about rewriting a few articles from Lurk.