Forget writing properly for a while. As Rik would say "Who needs rules?"
Let's write a sitcom with about a hundred characters, exposition aplenty and no point whatsover.
I'll start. If no-one joins in I'll look like a muppet!
Worst sitcom ever - Episode One
sfx Foghorn
JaneP: Hello Swerytd. I didn't know you were back. Why aren't you still in space building a nuclear shelter for the BCG and filling it with Aaron's comedy DVDs?
(JaneP drops dead for no apparent reason)