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.
At age 55, I own high-end rental properties (near the beach) and commercial buildings servicing the medical industry. I was widely criticized during my career for not living up to my income; that is, buying big homes with many fancy cars. I married a great woman who understood that saving and investing today meant a better lifestyle and more freedom tomorrow. Our passive income is half of my active income from sales, but my net worth has increased substantially. We are both happier and healthier than we were in the high-stress pressure cooker of franchise sales. The naysayers have become converts to the concept of passive income, but they have locked themselves into a “big hat, no cattle” lifestyle. It has been a great ride!
What I’m doing: My realistic goal is to have a blended annual return of 2x the risk free rate. With a current 5% hurdle, I am not paying down mortgages that cost less than 4%. Debt at 5% is a wash. My realistic blue sky scenario is a 3-4X rate of return over the risk free rate which can be achieved with property, stocks so far for the past five years, and certain private equity investments. Where I am dragging is my blended average CD interest rate of roughly 3% from an old CD coming due. I’ve rolled some money into a 12-month CD with CIT Bank at 2.5%. It’s the best rate I can find. 
My personal finance blogs were started with $100, but you can start a blog with $20 if you buy hosting on a monthly basis. That’s 4 Starbucks coffees or 4 packs of cigarettes many paycheck to paycheck people do find a way to buy. After six months of HARD work, my first site started generating $2,000 a month, and today, those three sites generate over $5,000 a month, while all I have put in was hosting for $100-ish every year each, and a website redesign for under $1,000 after three years. Freelance writing and translation jobs are also a sizable part of my income that did not require any upfront investment. Investing $10 a month in index funds is also a realistic way for many to build yet another income stream.
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.
The World Travel & Tourism Council calculated that tourism generated ₹15.24 lakh crore (US$210 billion) or 9.4% of the nation's GDP in 2017 and supported 41.622 million jobs, 8% of its total employment. The sector is predicted to grow at an annual rate of 6.9% to ₹32.05 lakh crore (US$450 billion) by 2028 (9.9% of GDP).[250] Over 10 million foreign tourists arrived in India in 2017 compared to 8.89 million in 2016, recording a growth of 15.6%.[251] India earned $21.07 billion in foreign exchange from tourism receipts in 2015.[252] International tourism to India has seen a steady growth from 2.37 million arrivals in 1997 to 8.03 million arrivals in 2015. The United States is the largest source of international tourists to India, while European Union nations and Japan are other major sources of international tourists.[253][254] Less than 10% of international tourists visit the Taj Mahal, with the majority visiting other cultural, thematic and holiday circuits.[255] Over 12 million Indian citizens take international trips each year for tourism, while domestic tourism within India adds about 740 million Indian travellers.[253]
P2P lending is the practice of loaning money to borrowers who typically don’t qualify for traditional loans. As the lender you have the ability to choose the borrowers and are able to spread your investment amount out to mitigate your risk. The most popular peer to peer lending platform is Lending Club. You can read our full lending club review here: Lending Club Review.

Today I sent my Annual Message to the Congress, as required by the Constitution. It has been my custom to deliver these Annual Messages in person, and they have been broadcast to the Nation. I intended to follow this same custom this year. But like a great many other people, I have had the "flu", and although I am practically recovered, my doctor simply would not let me leave the White House to go up to the Capitol. Only a few of the newspapers of the United States can print the Message in full, and I am anxious that the American people be given an opportunity to hear what I have recommended to the Congress for this very fateful year in our history — and the reasons for those recommendations. Here is what I said …[4]
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.