Hi,
First you have to do the On Page work. then Off Page work.
In On Page
1. Page Titles
2. Meta Descriptions
3. Meta Tags
4. URL Structure
5. Body Tags (H1, H2, H3, H4, etc.)
6. Keyword Density
7. Image SEO,Alt Tag
8. Internal Linking
9.Fresh Content (means no any duplicate content)
For Off Page Activities:
Article Submission
Forum Posting
Blog Posting
Blog Commenting
Directory Submission
PPT Submission
PPT Bookmarking
Video Sibmission
Social Media Promotion
This strategy definitely help you for increase the rank of website on search engine results.