Backlinks. Everybody wants backlinks. Its one of the keys to SEO.
There is however a key to achieving backlinks; a friendly character.
If you find yourself as a friendly character, get to know people. In my daily life, I meet a new business/normal person who has a website. I begin by creating a friendly relationship; sharing ideas, dreams, products and sometimes warez
Sooner or later, you'll find there is an existing bond between you and the "friend".
And now, all you say is:
"Hey bro. Would you mind putting up a link to my site if I put up a link to your on mine?"
Its 90% guaranteed they'll say yes.
Give it a shot.
If it doesn't work, you suck