Good topic . . .
A while back, I came up with a strategy to do so. I noticed that many wealthy entities, whether they be institutions or individuals, had several income ventures, all of which would feed the other, and feed off each other. So I came up with a little strategy that consisted of a few things:
Low Risk Bank Income:
By stacking CD's against one another in longer term CD Ladders, I would enjoy regular income, from long term CD's. For example, if you put $200,000.00 into a 5 stacked CD ladder, compounded quarterly - each a 36 month maturing CD - can yield you much more than a rollover single CD for that time period, and you get the liquidity since they are stacked.
Take a portion of the CD income (5%) and stick it towards Stock accounts.
Dividend Income:
80% of what's in the stock account goes towards Dividend Investing. It's a little method I developed when I studied the long term buy and hold strategies. It combines Dogs of the Dow, Seasonality, Dollar Averaging Investing and Dividend Investing - with a very specific screen.
Take 3% of my profits and stick it towards my Commodity Futures accounts. Another 3% of my profits, and stick it towards an account that will roll the money into the next maturing CD. So I therein create a circle in which two enterprises, are feeding each other. My CD's are feeding my dividend investing, which further feeds my CD, which further feeds my dividend investing; and so on.
Trading:
The most risky of my adventures.
I trade stocks (20% of my account), and futures options. I don't engage in stock trading from July 15th to November 1st. In that time, I engage in Futures Options trading. So far, I'm 6 for 6, and trying to pull out of the 7th Soymeal trade with a profit (I have a put option - December contract)
At the end of the year, take a percentage of the profits (around 5%) of the Futures trading, and split it. Half goes to the Bank for CD growth, and half goes to my investing accounts