If you have programming knowledge you can pursue the idea of creating paid browser extensions. You probably have used and know some life-safe browser extensions such as Ad-block or password manager extensions. Turns out selling extensions can be quite lucrative, if you solve a recurring problem many would be willing to pay and get an extension to solve that problem. For example Amit Agraval is estimated to make 10 to 30 million dollar a year selling browser extensions that add features to Google Workspace, such as Gmail or Google Docs.