Now, how do you do it? Building a passive income will require some work up front, but choosing a method that plays to your strengths will yield the most success, and it can even become a fun hobby! Have an aptitude for photography? License your photos to stock photography websites. Or maybe you’ve always wanted to invest? Learn how with a robo-advisor. No matter what your strengths are, we’ve gathered 35 ideas for different ways you can generate passive income and build your wealth.