One of the best ways to build wealth is to get a handle on your finances by signing up with Personal Capital. They are a free online platform which aggregates all your financial accounts on their Dashboard so you can see where you can optimize. Before Personal Capital, I had to log into eight different systems to track 28 different accounts (brokerage, multiple banks, 401K, etc) to track my finances. Now, I can just log into Personal Capital to see how my stock accounts are doing, how my net worth is progressing, and where my spending is going.
If you have a blog or other type of site, you can build affiliate links to different services on the website. Many people use Amazon as an affiliate partner. For example, if you are a beauty blogger writing about different products, you can set up Amazon affiliate links on your blog so that whenever someone buys the product you mention on Amazon, you receive a percentage of the sale. Amazon is not the only affiliate partner out there. Here is good, in-depth information on affiliate marketing. 
People's lives these days are so fast paced that multitasking has become the need of the hour. That explains why podcasts have suddenly become so popular; they allow people to get information or entertainment while they're in the middle of commuting, working out, cooking, or something else. Podcasts are easier to create than YouTube videos and can be shared just as easily on iTunes. Just select a topic that you're well-informed or passionate about, and start a podcast around it, it's that simple.
India became the world's third-largest producer of electricity in 2013 with a 4.8% global share in electricity generation, surpassing Japan and Russia.[224] By the end of calendar year 2015, India had an electricity surplus with many power stations idling for want of demand.[225] The utility electricity sector had an installed capacity of 303 GW as of May 2016 of which thermal power contributed 69.8%, hydroelectricity 15.2%, other sources of renewable energy 13.0%, and nuclear power 2.1%.[226] India meets most of its domestic electricity demand through its 106 billion tonnes of proven coal reserves.[227] India is also rich in certain alternative sources of energy with significant future potential such as solar, wind and biofuels (jatropha, sugarcane). India's dwindling uranium reserves stagnated the growth of nuclear energy in the country for many years.[228] Recent discoveries in the Tummalapalle belt may be among the top 20 natural uranium reserves worldwide,[229][230][231][needs update] and an estimated reserve of 846,477 metric tons (933,081 short tons) of thorium[232] – about 25% of world's reserves – are expected to fuel the country's ambitious nuclear energy program in the long-run. The Indo-US nuclear deal has also paved the way for India to import uranium from other countries.[233]
Dividends made sense 40 years ago as a relatively simple rule of thumb, but after all the work done by John Bogle with index investing, and academics with Monte Carlo sims and the 4% rule, dividend investing just isn’t the simplest, cleanest way to invest or receive passive income anymore. It’s actually significantly more risky compared to index investing, because dividend companies are a much smaller share of the total global economy compared to the broader indices.

I wouldn't think of a high yield savings account as a source of passive income but your savings should be getting something (less like Seinfeld syndication residuals and more like a commercial jingle residuals!). It won't make you rich but it's nice if your baseline, risk-free rate of return on cash is 1% or more. The best high yield savings accounts (or money market accounts) offer higher interest rate and there is absolutely no risk. CIT Bank currently leads the pack with the highest interest rate.
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. 
Affiliate and referral marketing involves driving sales for another business which then pays you a commission for each sale it acquires through your efforts. The Amazon Associates affiliate marketing program is one of the best options for people looking to earn money this way. You need set up a website with outbound links redirecting to products on Amazon (or another site that offers affiliate programs) and if a visitor from your site buys the product, then that business pays you a share of the amount spent.

The business process outsourcing services in the outsourcing industry in India caters mainly to Western operations of multinational corporations. As of 2012, around 2.8 million people work in the outsourcing sector.[216] Annual revenues are around $11 billion,[216] around 1% of GDP. Around 2.5 million people graduate in India every year. Wages are rising by 10–15 percent as a result of skill shortages.[216]

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.