The vast majority of my investing is in retirement accounts and won't be tapped for income until I reach at least 59.5 years old. However, I have a very small taxable investing portfolio (less than $5k) with Ally Invest where I invest in a handful of stocks that I value. I do not use the earnings as income – I simply hold these stocks. But I have an unrealized gain of $340 from this year so far.

Blooom: Blooom works very differently from many of the other robo-advisors. It helps specifically with your employer-sponsored accounts (401k, 403b, 401a, and 457 accounts). Blooom will go through all the investment choices and make adjustments for you. The service also automatically rebalances the account as it grows. Blooom is very inexpensive when compared to a traditional advisor at only $10 per month no matter how large your 401k grows.
When done correctly, investing can be a great way to generate residual income. There are many different types of investments you can choose from to earn income passively — whether you choose to purchase high dividend stocks, try peer to peer lending, or choose to invest in real estate. No matter what you choose to do, make sure you do your research first and talk to a tax advisor to ensure you understand your specific situation and what option is best for you.
If you're looking to get started in real estate, look at a crowd funding solution like RealtyMogul. It works similar to LendingClub - you commit as little as $5,000 towards a property. When the property is fully funded, you become an owner, and will receive your share of the earnings and appreciation in the property.  Check out RealtyMogul to learn more.