There are a variety of business options that you can do that really match your skills and interests. If you open a business similar to what you do for your job, you will need to make sure you are not violating any competition agreements and see if there are rules about taking clients with you so that you do not run into problems later on.  If going back to school for an additional degree is not a good fit, consider going back to get additional certifications for your current field of work. This may be less time consuming and less expensive and help you earn more money. Another way to profit from your hobbies is to create a YouTube channel or show based on the hobby. You can show how to make the items or review items that you use on a regular basis. If your hobby is gaming, you can even do videos of walkthrough and commentary with your friends. It can take time to build a following.  However, if you stick with it and are consistent this may turn into a great way to make extra money. The key to passive income is to build up a solid base that will generate revenue for you. If you write books, you will need to have four to five published before you see the passive income begin to be established. With a blog or website, it can take several years. This is a long-term project and it should be about something you really enjoy. Do not be afraid to look for a new job if you are not making enough money to cover your expenses. It can be frustrating to be in a job where you feel stuck or underappreciated. Take the time to look for a new job regularly.