Seven of the ten counties in California with the lowest per capita incomes are located in the Central Valley. Two of the remaining three are rural counties in Northern California. This leaves Imperial County, which shares California's portion of the U.S.-Mexico border with San Diego County. All of these counties had populations not exceeding 1,000,000, and all of them are landlocked, with the exception of Del Norte County.
I run several online businesses now (all it takes to start one is a domain, hosting, and maybe incorporation). There are two notable ones. The first is meal plan membership site called $5 Meal Plan that I co-founded with Erin Chase of $5 Dinners. The second is the umbrella of blogs I run, including this one and Scotch Addict. They pay me ordinary income as well as qualified distributions since I'm a partner.
It’s obvious, but every successful product solves a problem or fills a need- if the problem must be solved quickly, even better. What’s an urgent need? How about a car repair when you’re stuck on the side of the road (‘had the transmission on my car give out on a highway exit ramp. I don’t recommend it). Another good example is heat or air conditioning repair at home.
India is one of the largest centres for polishing diamonds and gems and manufacturing jewellery; it is also one of the two largest consumers of gold.[183][184] After crude oil and petroleum products, the export and import of gold, precious metals, precious stones, gems and jewellery accounts for the largest portion of India's global trade. The industry contributes about 7% of India's GDP, employs millions, and is a major source of its foreign-exchange earnings.[185] The gems and jewellery industry, in 2013, created ₹251,000 crore (US$35 billion) in economic output on value-added basis. It is growing sector of Indian economy, and A.T. Kearney projects it to grow to ₹500,000 crore (US$70 billion) by 2018.[186]
Capital growth in your portfolio can offset the eroding effect of inflation.  But any capital gains that exceed the overall inflationary effect can be drawn off to augment your portfolio income.  Of course, you must first generate those gains by making thoughtful investment selections.  While allowing strongly growing assets to keep doing that, it is prudent not to allow them to become a dangerously large part of your portfolio lest they go off the boil.  So if you selectively trim profitable positions along the way, you can boost your income.
Online learning platforms have become extremely popular in recent years with people using platforms like Coursera, Lynda, and Udemy for learning courses about their specific interests. If you are knowledgeable in any field, whether it's web programming, photography or digital marketing, you can create a course on platforms like Udemy or Unacademy and earn money when users register for them.
If you happen to have a blog that attracts a large, devoted viewer base each day, then selling branded products on it is an excellent way to make a little extra money. Things like t-shirts, posters, mugs, and bags that feature your brand name, or some witty copy that your niche may find attractive, will definitely find buyers on your site. You can also link up with affiliate marketers to drive more sales if the business seems to be working out.

I think more and more people are recognizing the advantages of having multiple sources of income, thanks to the Great Recession. It was a real wake-up call to many good workers who lost jobs not because of poor performance but due to restructuring and cost-savings. They never considered themselves to be vulnerable and they were. We do have multiple streams of income and a fully-funded emergency fund, which has helped my family weather the ups and down life has brought us, including job loss.

Portfolio income can come from multiple sources – interest/bond coupons, stock dividends, financial strategies including derivatives and capital growth.  Each offers some cash flow and some also offer potential capital gain with some risk from liquidity and volatile prices.  In this low-yield environment, many investors rely too heavily on cash flows and to pursue this are venturing further into riskier areas than they’d normally consider.