If it's a web site/blog that provides content to a specific niche, I'd recommend listening to some of what Gary Vaynerchuck (search on Youtube) has to say. More

If it's a web site/blog that provides content to a specific niche, I'd recommend listening to some of what Gary Vaynerchuck (search on Youtube) has to say. More than anything, he just encourages you to market yourself, cold call, and really be personal with your visitors. If you're building a web application, there's Don't Just Roll the Dice (http://businessofsoftware.org/ebook.aspx http://businessofsoftware.org/ebook.aspx), which provides an excellent guide to software pricing. Unless you're serving a specific niche that advertisers will like, add a price to your application. Actually, even if you're serving a specific niche, add a price. If you're looking to sell eyeballs, you'll need a ton of eyeballs before you'll even recover your costs. Your question was a bit vague, so I can't really give a specific answer. But assuming you are able to get hundreds of thousands of people flooding your site daily, you can slap some ads on it at any time.