Another friend found a burger bar, which served chilli burgers. He had never tasted these before and loved the taste of the chilli sauce. So he got in touch with the supplier, and supplied them with bottles and lables, and started taking orders from restaurants world-wide, through a little (very little) marketing savvy. He started 2 years ago and is now about to be bought out for over 1.2 million.
Commercial use requires 'releases' - editorial use doesn't. Stock photos can be sold for commercial (eg, marketing) or editorial (ie, journalistic) use. You'll have more opportunities to make cash if your photos are available for both, but photos containing people or property (including branding and logos) need signed releases to be sold commercially.
You can also do a good bit of reselling on Craigslist. If you know a lot about certain items (like sporting goods or shoes), you can pick up a real steal on Craigslist and turn around and resell it for what it’s truly worth. The other great opportunity on Craigslist is the “free stuff” section. Often these free items have some value; if you can pick them up and resell them on Craigslist or elsewhere, that’s almost pure profit.
3) Popular twitter accounts. Once again this is a new and rising field of "employment" where many people are making high five figure salaries (even six figure for some) a year simply by tweeting. Create a twitter account focused on one subject, whether it be movie quotes, funny pictures, or tweeting facts about a certain topic, and focus on this niche. If the niche is small, be sure to freguently change your account. I myself started one account that followed the latest trends and I would change the account name and everything to follow the latest social media trend. You can easily gain thousands of followers per trend and soon you have six figure followers. Then work with an advertising compamy and tweet out advertising links and you will earn money based on the number of unique impressions you earn. Although time consuming, you develop a solid account that will earn money almost guranteed in the long run.
The quality and service of your website are as important as the advertiser’s website. If your visitors become unhappy and dissatisfied after purchasing the product you advice, they think nothing of taking your advice, again. I mean it hurts your credibility. So, focus on choosing the ones that offer good customer service while promoting the person or company.