I always think that creating multiple sources of income is the best way for you to retire peacefully. It is important as you no need to worry much even do not have to work anymore.
Multiple sources of income do not mean that you need to work for several jobs for multiple incomes. If you have more sources of income, then the more stable you are when facing global economy crisis. For example, when you loss your main job and most probably you will be jobless for few months. During this time, you still have passive income that can support your living expenses.
If the income that you earn needs you to put your mind, energy and time on it, then that’s not considered as a good passive income. In my opinion, if you plan to create few website or blog and want to make some money from there, then that’s the goal of online business and it’s a great thing. This is because you can create a product to sell, or maybe you can selling ads space, promotion of services, or some other method to monetize your site.
Besides that, you can try out investment which involves making money out of your accumulate capital. Some examples of multiple sources of income in investment opportunity will be stock investment, mutual fund investment, property handling, multi-level marketing, freelancing etc.
Whatever other source of income may be the key to success and it depends on your risk taking. So, do more research before you opt for a particular source of income.