If my website have 700 unique visitors a month and 4:00min avarage on site, how do i make money from it?

[Aricus]

700 unique visitors per month isn't a lot, though it's a start and 4mins of view time is pretty good.

However, if you can to turn the 700 visitors on a daily basis you should easily start making some money each month. Though, I can't comment on how much, as the amount would probably be random.

Personally the best way to bring more revenue for your site is to increase your site's traffic. The general rule is the higher your traffic the higher your sales.

And the best way to increase traffic will be to implement good SEO techniques to your site, having good content, and advertising your site through social networking such as facebook, twitter, digg, and etc.