If you're interested in online marketing, setup email software and create a lead magnet that you can use in your sales funnel. Then, build up that list. It's often said that you can expect to earn about $1 per subscriber per month. If you have a list of 10,000 subscribers, that means you can earn roughly around $10,000 per month. You will need to deliver value and not pitch them on every email, but it is a very achievable goal in a short period.
Create custom alerts on your phone for affiliate sales – if you use GMail, go to your settings and create a filter so all emails with “SiteGround Affiliate Sale Generated” in the subject line go into their own folder (tweak the subject line to match whatever email notification your affiliate sends you). Then setup a custom alert on your phone using the GMail app so anytime you generate a sale, you get a custom alert (here’s a tutorial for Android and here’s one for Apple). I have different notifications for SiteGround, StudioPress Themes, etc. Makes your day better :)
Mechanical Turk is Amazon's take on micro-jobs. These are small miniscule-jobs that you can do for other people, which they call HITs, or Human Intelligence Tasks. These are super simple tasks that anyone can do. Some examples are listing off some URLs with certain kinds of images for one cent, or recording a few phrases with a microphone for 6 cents.
Cafe Press: This website allows you to create digital designs that can then be sold on the platform. You'll earn a commission for everything that sells and you'll never have to deal with logistics like printing, warehousing and customer service. If you have some graphic design skills, then this is a great potential source for your web-based income.