Content of your website is very important for long term result. First you should focus on quality and fresh content. Do on-page optimizations like website design, Meta tags, image optimization, keyword research, robots.txt, and search engine friendly URLs etc. Create high quality back-link by above described methods, should not create a lot of back-link in short time of period. Increase your activity on social media because social media share is also an important factor for search engine ranking.