If you highly educated and interested in working in the education industry, you can also create educational videos and courses and sell online. If you are expert and good at teaching, you can make relevant videos and sell online to companies like Udemy.com, Lynda.com or skillshare.com. There are lots of interested students who want to learn and are willing to pay for the courses. You can tie up with such websites and sell your courses online.
He makes a strong case for network marketing and offers the difference between investing in say a franchise for hundreds of thousands as opposed to starting your own network marketing business, which is much like a franchise with a proven system only you can start with literally nothing down and use the leverage of people. Similiar concept as real estate with some of the advantages of franchising. No capital investment with huge returns.
What I did:The first two years of work in NYC was brutal. I told myself there was no way I could work on Wall St for my entire career because I’d probably die from heart failure by age 40. Having an early death in my mind willed me to save 50%+ from the first year onward and devise a CD, real estate, and stock investment distribution system for my savings every year. I thought about starting this site for at least a year before I hired someone from Craigslist to give set me up and push me forward. Hiring someone to get started is totally worth it if you are a master procrastinator. You can now learn how to start your own site with my step-by-step guide to save yourself time and money. 
It was easier recouping the lost $60,000 in rental-property income than I expected. For so long, my primary mindset for passive income was rental income. Having $815,000 less mortgage debt but still generating roughly the same amount of passive income with a much larger cash balance feels great. Further, my passive-income portfolio got even more passive, which is good as a stay-at-home dad to a newborn.
When you build a business, you're giving up active income (instead of working for pay, I'm volunteering at my own business) for future active and passive income. In the meanwhile, you'll need a way to pay for your expenses. It could be that you're building a business on the side, so you still have a day job, or you're living on those savings. Either way, you need a cushion.
The Mughal Empire had a thriving industrial manufacturing economy, with India producing about 25% of the world's industrial output up until 1750,[78] making it the most important manufacturing center in international trade.[79] Manufactured goods and cash crops from the Mughal Empire were sold throughout the world. Key industries included textiles, shipbuilding, and steel, and processed exports included cotton textiles, yarns, thread, silk, jute products, metalware, and foods such as sugar, oils and butter.[71] Cities and towns boomed under the Mughal Empire, which had a relatively high degree of urbanization for its time, with 15% of its population living in urban centres, higher than the percentage of the urban population in contemporary Europe at the time and higher than that of British India in the 19th century.[80]
The obvious way to earn a second income is to get a part-time job. If you are not currently working, this is an excellent way to start as it gives you the freedom and flexibility to start other passive income opportunities.  The other option is to simply work from home full time which frees up commute time so you can focus on building more income streams.
These days, low-risk bond yields aren’t enough to meet most income needs. When investing in bonds, the income typically comes as coupon payments – contractually guaranteed interest payments at predictable intervals.  There are many kinds of bond income available, so you must strike a balance between reaching for higher income (yield) and limiting risk.