This is a great idea for a thread! I couldn't help taking a peek...can I add something? I'm sorry, I can't resist, it's the English teacher in me
THAN is normally used in comparisons:
I like Mika more than Amy Winehouse.
She can run faster than me.
THEN is to do with time:
I finished my homework, then I went to the cinema.
(Sorry I hope I'm not stepping on anyone's toes here, I couldn't resist