These are just a few ideas to get you thinking about what you can do to create a multi-streamed income. Your project might turn into a full-time job in itself or it could just be a back-up plan that gives you peace of mind while you continue to work a day job. Finding extra work that you really enjoy can be a great way to share your skills, meet new people, and take your personal finances to the next level. 
Reality Two: You have a limited amount of time on this planet to implement your business plans and strategies, while also trying to balance the needs of family, health, spirituality, recreation, relationships, and much more. Do you really want to spend your limited time nursing more than one stream of income? Happiness has more to do with balancing life than making tons of money.

After many years I finally achieved FI and my dividend portfolio basically covers my living expenses. My wife still works in wealth management and I also help her grow her client base. Just about to release a book that I co-authored called Victory Lap Retirement which will be a new source of income. Also plan on doing public speaking and seminars in support of the book which will be an additional new source of income. I will also be creating a Victory Lap website and blog to help sell the book and hopefully over time create a VL community. I will not advertise as I do not want to commit to when I have to produce a blog. I worked hard to get FI and I don’t want to give my freedom back by forcing myself into a set schedule if that makes sense. So basically I will end up with 5 sources of income including ss and most of them are aligned with my passion play. Not a bad way to go out.
4. Calculate how much passive income you need. It's important to have a passive-income goal — otherwise, it's very easy to lose motivation. A good goal is to try to generate enough passive income to cover basic living expenses such as food, shelter, transportation, and clothing. If your annual expense number is $30,000, divide that figure by your expected rate of return to see how much capital you need to save. Unfortunately, you've got to then multiply the capital amount by 1.25 to 1.5 to account for taxes.
An employee's main job location (principal place of work) is usually the place where the employee spends most of his or her working time. If there is no one place where most of the work time is spent, the main job location is the place where the work is centered, such as where the employee reports for work or is otherwise required to base his or her work.
You can select any of the above-mentioned, based on your interest, skill, and capability to generate a second income source. However, these are just to name a few, there exists multiple ways to generate secondary income channel. You just need to identify the right one, which suits you the best. Remember there is no shortcut to success and you need to work hard to be successful and rich in the long run!
California had a per capita income of $29,906 during the five-year period comprising years 2010 through 2014. About every third county and every third place in California had per capita incomes above the state average. Though somewhat counterintuitive, this implies that counties and places with per capita incomes even slightly exceeding that of the state can be classified as "high income" given the natural division of places into a top third (high), middle third (medium), and lower third (low) when ranked by per capita income. Hence, the upper third of all places in this ranking have a per capita income with a lower bound roughly equal to that of the state, about $30,000. The median place and county in California had a per capita income of roughly $25,000, and the lower third of both types of geographies had per capita incomes with an upper bound of about $20,000. Places and counties with the highest per capita income were concentrated in the San Francisco Bay Area, which has a relatively high cost of living. Those with the lowest per capita incomes were concentrated in the Central Valley, an economy in which agriculture assumes a primary role.
There are a ton of ways to diversify your investments, some of which can send real income your way. By opening a brokerage account and investing in ETFs or mutual funds, you can earn real returns you can use to supplement your income. Of course, the flip side can also happen – as in, you can lose money. So, make sure you understand the risks before you dive in.