There a plenty of online jobs that pay well and aren't scams, but there is also a huge demand for these positions.
Depending on your location, there are usually a range of opportunities to work from home for a good wage. Here are a few ideas to get you started.
Many businesses require work from home typists to help them to create reports and transcriptions. This requires a high level of typing proficiency, and you'll usually be asked to take an exam to check that you're accurate enough. Try searching for "work from home typist" in Google to find things in your area.
Blogging
Blogging is another great way to earn a fantastic income, but it will likely take a while before you make any money. In order to become a blogger, you need to choose a topic that interests you, and write about it frequently on your own website. You can place adverts such as Google Adsense onto your site to earn money from readers who click on them.
Apps
There are a fair few apps these days that allow you to make money doing little tasks like photographing products in stores, and checking that the aisles are arranged correctly. Field Agent is a great app for this, but it depends where you are in the world as to whether there will be any available tasks.
One thing I'd note about these apps, however, is that they can't really be relied upon as a full time income. If you're wanting to make a bit of cash on the side, though, they're perfect.
Overall, there are plenty of ways to make money online if you know what to search for. Try combinations of "online job vacancies", "work from home jobs", "full time home working job", and any other searches that are similar to that, and you're bound to find something that's suitable for you.
