Avoid a power hour for wines. You can use crackers or drink water to neutralize your palate between wines. If you get tired of smelling wines, have some coffee grounds on hand to refresh your nose.
When you stick your nose in a glass of wine, what do you smell? Most of the time, the aroma will be fruity, floral or spicy. But what if you smell rotten eggs, wet newspaper or a barnyard? More than likely that wine is flawed.