Q. One has a choice to either make Havdalah himself and let someone else drink the wine, or to delay making Havdalah until a little bit later and make it himself and drink the wine. (If he does the first choice, he cannot drink the wine, because he needs to drive.) Which is preferable (one should generally not delay doing a mitzvah)?
Also, one has a choice: make Havdalah on wine, and someone else will drink, or make on chamar medina and drink himself. Which is better?

A. Horav Shlomo Miller’s Shlit’a opinion is that it is best to recite havdalah early and not to delay a mitzva on hand (Mechilta Bo 9), then drink a small sip of the wine and give the rest to one listening to the brocho, who will not be affected by drinking the wine.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a