Again, these are just some of the ideas to create an excellent source of side income while helping out more clients and adding dollars to your bottom line. Nutrition specialists in a corporate setting might analyze nutrition for products, implement and design research for pharmaceutical companies, or run corporate wellness programs that focus on improving health, reducing sick leave, and decreasing overall healthcare costs. Hotel Fitness: How to get a great workout in a small space. Leave this field blank. If nothing else, you can take the time to look and see what else is on offer.