A few tips:

• Keep your cadence high, and pedaling pressure lower.
• Keep your hands in similar positions on the handlebars (as opposed to one on the hoods, one on the drops).
• Watch 100 feet or more ahead.
• Practice being able to look over your shoulder without turning the bike.
• Keep your speed high enough that you have adequate gyroscopic forces working for you, and fast enough that you don't lose "steerage."
• Don't ride in or on the side of ruts.

I'm sure there are a lot of other tips, but the most important is practice, and correct bike fit.