Excellent collection of ideas!!! As always, very nice write up. Also for people interested in teaching say you are good in some technology, you can go and drop your CV to any training institutes which teach that technology. Most of the training institutes these days do not have full time faculty working for them, its mainly people working for some companies coming and taking part time classes as a visiting faculty either during weekdays/weekends. You just need to go teach and get your pay which will be either in terms of per hour basis or per course basis. Very effective way, though I do not do it now, I had used this for quite some time and made some good money.
Freelance writer: If you have a knack for writing, you can earn great money writing for others. Not sure how to start? Contact bloggers, who are always looking for great writing. As blogs grow, they can afford to pay freelancers good money for quality articles. Websites looking to build links also hire freelancers to write guest posts to be published on blogs and websites.
Based on my initial experience of passive income, I feel real that real estate is best vehicle to build long-term investment. I live in Los Angeles and was able to cash flow my first rental property. What are you thoughts about starting out to build a passive income portfolio? I have utilized Lendingclub, online savings, and a small dividend/bond portfolio.
My dad is in  a similar situation as we speak, things have not been going well for him at work (but I do think he has himself to blame) and seems likely he will get let go.  Mr. Budgets and I both see how our parents are and we totally want to be on the other end of the spectrum when it comes to how they handle money. It motivates us to save and invest even more.

The biggest surprise is real estate being second to last on my Passive Income Ranking List because I’ve written that real estate is my favorite investment class to build wealth. Physical real estate doesn’t stack up well against the other passive income sources due to the lack of liquidity and constant maintenance of tenants and property. The returns can be huge due to rising rental income AND principal over time, much like dividend investing. If you are a “proactive passive income earner” like myself, then real estate is great.
Further north, the Saurashtra and Bengal coasts played an important role in maritime trade, and the Gangetic plains and the Indus valley housed several centres of river-borne commerce. Most overland trade was carried out via the Khyber Pass connecting the Punjab region with Afghanistan and onward to the Middle East and Central Asia.[69] Although many kingdoms and rulers issued coins, barter was prevalent. Villages paid a portion of their agricultural produce as revenue to the rulers, while their craftsmen received a part of the crops at harvest time for their services.[70]
Don't mistake passive income with zero work. It's still work, it's just that your income is not directly tied to the hours worked. Anyone who owns rental properties knows that it's considered passive income but there is quite a bit of work involved. The work is front heavy but if you are lucky, you can collect rental checks without incident for many months before having to do work.

An obvious example is over exposure to bank stocks, which have been excellent investments for over a century.  Though a foundation of most portfolios, bank stocks do involve more risk at certain stages of the economic cycle than many realise.  Being less exposed to bank shares in the last few months could have preserved some capital.  So, a more diversified approach can help mitigate some of these risks.