A niche affiliate site often presents like an eCommerce store. To get started with an affiliate site, choose your niche then display products with pictures, descriptions, and prices, just as you would on an online store. However, when visitors click the ‘buy’ button, they will be taken directly to Amazon, to make the purchase. You then make an affiliate fee for sending the traffic to Amazon, but have none of the packaging hassle, or initial financial output creating or buying the products.
In this example, a blogger might put this link on their blog to try to get their readers to click through to your “blue widget” page and hopefully buy something. If the visitor who clicks on this link actually buys something, affiliate tracking software will automatically (usually – depends on what system you are using) pay your affiliate a percentage of the sale.
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.
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.