RavingGrob

https://en.wikipedia.org/wiki/Compose_key

I set my caps lock key to the Compose Key (ck), and it changed the game for me:

• — is ck then “—”
• é is ck then “e” followed by ’
• ° is ck then double “o”
• ½ is ck then “1” followed by “2”

I’m sure there’s many more combinations, but honestly, I never intentionally used CAPS LOCK for anything.