Check out this article on six, well different, approaches to investment.
From the link, number one:
You should hold more in stocks when you’re young, and less when you’re old. That’s the conventional wisdom. After all, stocks tend to do well in the long run but are volatile in the short term. But when you’re in your twenties or thirties and have the longest to run, you might have only a few thousand bucks in the market. By the time you’re in your fifties and sixties, you’ll have the most money but will want to risk less of it.
In their book “Lifecycle Investing,” Yale economists Ian Ayres and Barry Nalebuff propose an audacious solution: Increase your stock position with borrowed money when you’re young. You can do that with a margin loan from a broker. Or, as Ayres and Nalebuff prefer, with LEAPS, which are options to buy an index like the S&P 500 in the future at a low price. (You win if stocks beat that price plus your cost.) Either way, your top allocation to stocks should be 200% of assets, meaning every $1 of your own money is effectively matched by another $1 borrowed.