Commission Junction — This site serves as a clearinghouse for thousands of companies and small businesses looking to get into the affiliate business. It offers myriad affiliate programs, but you must apply separately to each one. Payout rates vary wildly, up to 50 percent, and some commissions are based on leads or clicks vs. sales. Frustratingly, Commission Junction deducts $10 from your accrued earnings for every month in which you don’t actively earn commissions; if you let your account lapse, your income could get wiped out.
When promoting affiliate offers, just make sure you are fully aware of all the terms and conditions attached to your affiliate program. Some programs can be strict about how they allow you to promote their products. For example, some may limit you to banner ads and links only, while others will allow you to use paid advertising, but won't allow email marketing.
Job Boards. When you’re first starting out, you’ll have to go looking for work, and the best place to do that is on one of the online job boards. Places like Guru, Elance, Freelancer, and oDesk are today’s writers’ best friends. They allow individuals and businesses to post projects, and freelancers to bid on them. Take a look around the sites, sign up for the free access in the beginning, and then begin to place bids on the projects that interest you. It will take some trial and error to find your groove, but once you do, the jobs will start to roll in.
If you have a good idea for an app, and the skills to create it, then producing your own premium app can be profitable. However, with so many free apps available, it may be hard to convince people to pay. If you want to go down the premium app route, consider having a basic free version to encourage people to download the app in the first place. You can then provide the option of upgrading to a premium plan once users realize how useful the app is.