You can write ebooks and record videos on the subjects you have knowledge! Sell them on your website and marketplaces. An example, posted some days ago at HN:

You can write ebooks and record videos on the subjects you have knowledge! Sell them on your website and marketplaces. An example, posted some days ago at HN: http://www.clickminded.com/why-appsumo-is-going-to-keep-crushing-it/ http://www.clickminded.com/why-appsumo-is-going-to-keep-crus...