Choosing a Comma, Dash, or Parentheses

Information set off with a dash is emphasized, but may be off track from the sentence. It can also indicate an interruption to the sentence.
Examples: I will now tell you tomorrow's winning lottery numbers – just kidding!
Now, take out your homework – please stop talking! – and begin with the first problem.
After school I have track practice – I'm so tired already!
Examples: Please deliver the packages to the back door (the one painted blue) between the hours of 10:00 and 2:00.
The most popular flavor of ice cream is vanilla (second is chocolate).
The new remote control car offers more features than any other (batteries are not included).