Some firms outsource their customer service operations and many of these companies accept home-based contractors. You can start by signing up on freelancing sites such as Upwork to test the waters with this business idea first. If you’re already a CSR specialist with management skills, then you can form and lead a virtual team online and engage clients as a bona fide customer service company or, provide customer service training to such teams as well as individuals.
If you're toying with the idea to pad your income with a side job, this book is a decent start. It gives you some suggestions about what to do, links to further resources (often other Nolo books), and some good tips on topics as diverse as marketing or how to deal with various types of business people, including lawyers. I went through the book easily and found it well- written and understandable.
Renting out an extra room sounds like a pretty smart idea. App development also sounds like a pretty good idea, I found the link you left about how Benny Hsu made 30000 in 30 days quite useful. I have always been unsure on how you can start a blog but the 6-part video that you left was very helpful to understand how better. I also liked the idea of car flipping. I think it could work quite well especially here in Hawaii. I have personally found that dividend investing to be very useful in increasing income. I was also completely shocked that you can be paid to be someone’s friend. That is crazy that you found that.