Consider affiliate programs. By finding an affiliate program suitable for your blog, you agree to provide links to a company's products, and in return are paid for each reader who makes a purchase after following your link. You can find specific companies by searching an affiliate directory such as ClickBank, or by searching individual company websites for affiliate programs. Consider these factors before you choose an affiliate program:
Working with advertising networks isn’t your only option when it comes to selling ads. If you end up with enough traffic, advertisers may come directly to you and ask you to place their ad on your site. You can also contact advertisers yourself. The biggest difference from the above mentioned option is that there is no middle man, which means you can set your own ad rates.