Double Prepositions

As you may well know, you can put prepositions in two places, like so:

To whom would you like to speak?
Whom would you like to speak to?

All we're going to say is…don't put the same preposition twice:

To whom would you like to speak to?

Wrong, wrong, wrong. This is a very common mistake. Pay attention to where you put your prepositions and you'll be golden.