Yes, use proper glassware. I use either a Reidel port glass or a Glencairn.
Here's a Glencairn with a bottle of Glenrothes 1998:
And here's my port glass with a miniature of Macallan 18yr:
Notice how both glasses have a very small circumference at the lip? This keeps the aromas compact and focused to the nose. Trying to nose a whisky in a tumbler is much more difficult.