New to supply teacher - advice wanted

[Teacherdeathstare]

I'm about to start doing a bit of supply teaching - secondary - in a tough part of the country.

Are the any supply teachers here who can give me their five best tips?

Many thanks in advance.

Check the behaviour policy
Find out where the toilet is / staffroom
Get to know names of children
I assume you already have activities prepped that you can whip out should they be needed.
Coffee!

Leave as soon as you can at he end of the day and don't get persuaded to take on more than your responsibilities.