I’ve learned that you can tell a lot about a man by the way he handles these three things: a rainy holiday, lost luggage, and tangled Christmas tree lights.

H. Jackson "Jack" Brown, Jr. (b. 1940) American writer

Live and Learn and Pass It On (1991)

Attributed by Brown to a 52-year old person. Often misattributed (with the phrase "rainy day") to Maya Angelou. For more see here.