Listen to or Hear

I like English lessons that are simple but with high impact for the speaker and today I offer one of those.
There is a common confusion among English learners regarding the use of hear and listen to. They seem synonymous but the difference is your involvement.

Hear is inactive; you do this without thinking.
Example: Paola can't sleep when she hears her husband snore.

Conversely, listen to is active; you give your attention to a sound.
Example: I often listen to the radio when I’m cooking.

What things do you actively listen to?