List - He had done it all: sailed the Atlantic in an open boat,
climbed the Matterhorn, and wrestled in the mud with Lola Lamour.
Explanation - There was only one thing he still wanted to do: corner
the market on Swiss Cheese.
A colon is correct only after a grammatically complete statement.
WRONG: He made money on: the stock market, the commodities exchange,
and his Saturday afternoon car wash. (The colon is incorrect and should be left
out because " he made money on" is not a grammatically complete statement.)
Colons are also used in some conventions.
Subtitles - Subject Meets Verb: A Love Story
After the salutation in a business letter with mixed punctuation