Over the past 8 years, more than 100,000 people from over 100 countries have participated in Google's Online Marketing Challenge. It's an online course with modules covering introductory digital marketing, search engine marketing, search advertising, display advertising, mobile, social, analytics, and video, making it one of the more comprehensive courses for beginners. However, it's also unique in that Google gives learners a $250 AdWords budget to use over a three-week period, to run an online advertising campaign for a business or not-for-profit. The most successful learners can even win prizes from Google.
Generate online advertising revenue. In addition to selling items or services and participating in affiliate marketing, you can use your website or blog to make money by selling advertising space. If you have a highly-trafficked website and/or highly-involved regular readers, you have a way to attract advertisers for related products and have them purchase advertising space on your site. However, this advertising will have to be related to your website or blog in some way, otherwise your readers won't be interested.