- Bribe someone at Google and Bing to get your site higher in the search result. But even that I would call off-page, since you don't do it on the pages of your own site (that's on-page).
- Start your own search engine.
- Buy Google and let it do what you want.
- Spread malware that manipulates the SERP (Search Engine Result Page) to put your site on page #1.
Not all are perfectly legal.
Hi Friends, Discuss some New ideas that must be Helpful to Increase website ranking. please Don't explain SEO On/Off page, SMO Activities Here.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic