If you are too busy in your life and job and have lots of responsibilities, you need to play safe. One of the easiest and probably best options to start with for earning passive income to invest your money into high interest paying saving accounts. A simple search on comparison sites can give you a little insight into what kind of rates are being offered by the banks and financial institutions on the saving accounts. So start putting your extra money in high yield saving accounts.
There are many ways to “go viral” from a marketing perspective. There are no viral marketing techniques which work for all industries so a tailored approach which includes one or more viral marketing channels is important. Videos are the most popular way, but social media posts, search engine result pages (SERPs), email marketing campaigns and even TV advertisements have created viral, trending content for company, either on purpose or accidently. There are many different types of viral marketing, but they can be lumped into three categories – content created by a business about their products, content created by others about a business’s products, and content that businesses pay influencers to create about their products through advertising and sponsorship. Below we talk about these types of viral marketing to highlight the variety of strategies you could have.
However, I think for those who are willing to do what it takes, the sky is the absolute limit. As an example, I’m trying to take a page out of FinancialSamauri’s book and create an online personal finance and investing blog. It is an enormous undertaking, and as a new blogger, there is a seemingly endless amount of work to be done. That said, I hope that one day I can not only generate some passive income from the hours of work I have put and will put into the project, but I hope to be able to help OTHERS reach their financial goals.

Endorsements are a form of advertising that uses famous personalities or celebrities who command a high degree of recognition, trust, respect or awareness amongst the people. Such people advertise for a product lending their names or images to promote a product or service. Advertisers and clients hope such approval, or endorsement by a celebrity, will influence buyers favourably. For example, Sach

It’s easy to think as passive income as money earned while sitting on a beach sipping mojitos, but there is lots of work involved, says financial coach and retired hedge fund manager Todd Tresidder. If you’re worried about being able to save enough of your earnings to meet your retirement goals, building wealth through passive income is a strategy that might appeal to you.
If you have specialized knowledge in a certain topic, you can put together an online course to teach others. For example, if you have experience in real estate investing, you can create an online course “Real Estate Investing 101”. The benefit of an online course is that once you create the course material, you can sell it to as many people as you want.
The disadvantages to consider with viral marketing include the nuisance factor. Due to the large amount of email people receive daily, viral marketing messages may be viewed as spam. Another consideration is negative marketing buzz. A message may not be construed as intended, and could be discussed in a negative manner. Viral marketing can also be hard to measure. 
Personal finance software can go a long way in helping you to take control of your money and meeting your financial goals. It’s important to note, however, that some focus more on budgeting and expense tracking while others prioritize investing portfolios and income taxes. Explore several different programs and read reviews to find the one that’s right for you.
Real-estate crowdfunding ($9,600 a year): Once I sold my SF rental, it was natural to reinvest some of the proceeds into real-estate crowdfunding to keep sector exposure. I didn't invest a lot in some of my favorite real-estate investment trusts because I felt a rising interest-rate environment would be a stronger headwind for REITs. But if I could be more surgical with my real-estate investments by identifying specific investments in stronger employment-growth markets, I thought I could do better.
Viral marketing or viral advertising is a business strategy that uses existing social networks to promote a product. Its name refers to how consumers spread information about a product with other people in their social networks, much in the same way that a virus spreads from one person to another.[1] It can be delivered by word of mouth or enhanced by the network effects of the Internet and mobile networks.[2]