Colons are misunderstood pieces of punctuation. They have several uses: to start lists like this one, to show elaborations, and to introduce quotes or examples. The main issue which sticks its foot out and trips up writer in the corridors is the difference between semicolons (;) and colons (:). Many writers seem to opt for a semicolon without realising the difference. Whilst colons are less common, they are very different from semicolons and cannot be used interchangeably. Take a look at this example: Samantha knew there was only one biscuit left: the digestive. In this example, the second section is used to elaborate on the first. The digestive is the same biscuit as the one referred to in the first clause. The link is direct rather than implied, and the second clause is incomplete. However, when the second clause is complete and of a substantial length, you may want to consider capitalizing the first letter after the colon. There was only one question on Samantha’s mind:...