In January 2018, I missed my chance of raising the rent on my new incoming tenants because it didn't come to mind until very late in the interview process. I didn't write about my previous tenant's sudden decision to move out in December 2017 after 1.5 years, because they provided a relatively seamless transition by introducing their longtime friends to replace them. I didn't miss a month of rent and didn't have to do any marketing, so I felt I'd just keep the rent the same.

No one should turn down wind farming’s ultimate passive income for the next 30 or more years … even 60 years when there is a positive cash flow on the sum total of all base payments when computing inflation for the next 60 years based on the previous 60 years, as long as the next era’s energy resource is not perfected (at which time they would not renew the option for the second 30 years).
As a private lender, you can lend to anyone in your social circle. For example, many home rehabbers need access to a source of capital they can tap into very quickly in order to fund the initial purchase of their properties. You can partner with a rehabber who uses your capital for a short-term in exchange for an interest rate that is mutually agreed upon.
One great way to generate a passive income is through affiliate marketing. Now, this does depend on the size of your list. Yes, size matters when it comes to your list. Especially if you're looking to make some serious money and do it on autopilot. But, list-building takes time. It doesn't happen overnight. And you need to add value to your list or you become obsolete.
Active income is needed because you know you can always push away to bring in steady income. Passive income is needed to bring in a little extra on the side. You must ensure to never put all your eggs in one basket. When generating multiple streams of income, you must have different sources to rely on – because in the end, nothing is 100% reliable.
When listing your collectibles online, selling through the right channels is key to ensuring you get the best price; look for specialist websites that are both specific to your niche and offer seller-friendly terms – luxury watch marketplace, for example, offers competitive listing fees starting at $5 US, a 90% sales rate and a money-back guarantee if your item doesn’t sell within six months. If you don’t already have a collection in place, it’s never too late to start – follow these tips on how to start a valuable collection.
India has the largest diaspora around the world, an estimated 16 million people,[363] many of whom work overseas and remit funds back to their families. The Middle East region is the largest source of employment of expat Indians. The crude oil production and infrastructure industry of Saudi Arabia employs over 2 million expat Indians. Cities such as Dubai and Abu Dhabi in United Arab Emirates have employed another 2 million Indians during the construction boom in recent decades.[364] In 2009–10, remittances from Indian migrants overseas stood at ₹2,500 billion (US$35 billion), the highest in the world, but their share in FDI remained low at around 1%.[365]
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.