Do you use this punctuation mark?

The main task of the semicolon (that’s this little punctuation mark here ;) is to mark a break that is stronger than a comma, but not as final as a full stop (or period in American English).

You might like to see how it’s used here (link to: en.oxforddictionaries.com).

The em dash

The long dash (also called the em dash) is a punctuation mark often used in informal writing. You can see it here (link to:en.oxforddictionaries.com)

The em dash is typically used without spaces on either side. However, most newspapers (and all who follow the AP style) use the em dash with a single space on each side.