PLAN YOUR PREFERENCES. With so many choices available, scale down your planning to just those wineries that specialize in your favorite varietal. Or, plan a day around exploring an unfamiliar wine style-you might become a new fan.

PUT THE BRAKES ON. It's easy to get caught up trying to visit several wineries during limited tasting room hours. With drives between, you'll soon be exhausted! Focus instead on up to four wineries maximum, and linger over the counter. You'll learn more savoring what's in your glass, instead of thinking about the time.

BE HYDRATED. Experts agree that you'll make the most of your taste buds if you've treated them to several glasses of water the day or night before.

MAKE APPOINTMENTS. Wineries often offer barrel tasting, vineyard tours, or even seminars available by appointment only. The most popular stops fill up quickly. Sign up for at least one special twist; you'll get the most out of the visit.

TAKE A NEW LOOK. Consider renting bikes for a scenic way to travel from vineyard to cellar door. The fresh aromas of soil (mixed with the occasional fertilizer) will become part of your sensory memory. Or, do something truly different-regions like France's Burgundy offer wine tasting day-trips by boat.

SPIT LIKE THE EXPERTS. Take a few sips and you'll soon be ready for someone else to drive. Practice what wine professionals do the world over and use the spittoons positioned at the tasting bar. Or, bring an opaque plastic cup for your personal use (some wineries have these available if you ask.) While you'll absorb a little alcohol, it is considerably less than if you consumed the entire sample.

END THE DAY RIGHT. Sparkling wine producers usually charge for tasting since theirs is a particularly perishable product. But most make up for it by offering a pleasant place to sip. Finish your tasting day with a stop for bubbly; locations like Mumm Napa Valley have excellent sunset views.