I just heard a report a couple of days ago that the largest investors in the US are currently buying up real estate versus putting their money into stocks right now.
To answer Zahc's question, I put money I don't want to roller coaster into the Vanguard Wellesley Fund. It's averaged a solid ten percent over the 50 or so years it has been around. Nowhere near the returns stocks are getting right now, but when stocks tumble, it still generally makes a little money, plus pays nice dividends. If I didn't already have real estate that keeps me busy, I would have bought more rental property over the last few years. Not so much now, as prices in most of CA at least, are getting back up to their previous high levels. Which goes to show that when you hear stuff like the market report I mentioned above on the news, it's probably already too late to make good money there.
The other thing I've done now that I don't have a paycheck anymore, is put a "five year emergency fund" of basic projected subsistence wages for myself (utilities, taxes, insurance, food, fuel, etc.) into the G and F funds of my TSP. They don't make squat on interest, but the money is still there even if Wall Street takes a temporary death spiral, and gives me a buffer to wait out market recovery. There's an opportunity cost on the money parked there, but I prefer to live with that versus having to get a job as a Walmart greeter. :)