Make sure you have an edge. Know what your edge is. And have rigid risk control rules.

If you have an approach that makes money, then money management can make the difference between success and failure... ... I try to be conservative in my risk management. I want to make sure I'll be around to play tomorrow. Risk control is essential.

Good money management alone isn't going to increase your edge at all. If your system isn't any good, you're still going to lose money, no matter how effective your money management rules are. But if you have an approach that makes money, then money management can make the difference between success and failure.