Tom Violence, the difference between "tu" y "usted" is just a matter of respect. "Tu" is like the "you" you use with friends, while "usted" is more respectful, like when with someone you just met. It's a matter of practice! Go have some fun with
SalsaChick, she'll teach you a lot!
KillaQueen, empecemos con lo sencillo porque no quiero que te me pongas impaciente... :P Que tal si empezamos con las expresiones de cortesia? "Buenos dias", "buenas tardes", "buenas noches", "hola", "adios", "mi nombre es...", esas que uno tiene que saber porque si no no sabe nada. :P