Amazing article Jim. Jammed packed with great information and inspiration for a finance blogger looking to find ways to diversify income streams. Building up your capital, achieved through saving more than you earn as you described, will open doors to a lot of activities in the future. The name of the game is putting your savings to work to turn expenses and idle cash into income producing assets. It isn’t easy when you are starting from $0, but through discipline and time you will eventually be able to achieve your goals and begin using the methods you described to diversify your income streams.
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.