I work as an IT guy but have been thinking about some sort of alternative sources of income. Here are some ideas I'm considering:

- Become a Personal Fitness Trainer

- Rental Real Estate

- Write a book or movie

- Freelance software dev

- Develop a website and/or app

- Pizza/food delivery

- Go back to school for an MBA or other advanced degree

Have any of you tried these things? Worth it or more trouble than it's worth?