Then & Than

I have been using Then & Than a lot.  I think I may have been using them incorrectly so I decided to look up the definitions.

then (adv) 1 at that time; at the time in question 2 after that; next; afterward : • also; in addition 3 in that case; therefore • used at the end of a sentence to emphasize an inference being drawn • used to finish off a conversation : see you in an hour, then.

than (conjunction & preposition) 1 introducing the second element in a comparison 2 used in expressions introducing an exception or contrast 3 [ conj. ] used in expressions indicating one thing happening immediately after another

So there!