There are two main channels for engineering successful outcomes for strategic-minded investors, but there are many ways to fail. To boost the odds that the former will work in your favor, it’s important to stay focused on key factors that will drive investment results, for good or ill. The first is asset allocation. It’s easy and inexpensive to diversify across asset classes on a global basis, thanks to the proliferation of ETFs and mutual funds. Why would you do that? Risk management. Rebalancing is the other big variable. The two together are a powerful combination. By holding a broad array of assets you’re in strong position to exploit price volatility, which is the raw material for earning a rebalancing bonus. But before you do anything, ask yourself one question: Are you confident that you can beat the pros by doing it yourself?