How to say I in Spanish

The Spanish word for I is yo.
How to pronounce yo in Spanish:
Click to hear the pronunciation of yo  
Examples of yo in Spanish:
Yo despierto.
I wake up.

Si yo fuese usted.
If I were you.

¡Sí, yo estoy despierto!
Yes, I am awake!

Do you know another example that uses I in Spanish? Please tell us where you read or heard it (including the quote, if possible).