Mr. Optimistic, I assume they're in so many words stressing the basic, classic, age-old extreme-turbulence technique: wings level, maintain attitude, disregard altitude, maintain the power you had going in (assuming you were at least intelligent enough to slow to maneuvering speed if you knew you were flying into turbulence).
Don't know what the equivalent of "maneuvering speed" would be for a swept-wing aircraft flying at, essentially, its weight-determined service ceiling...