TWU checklist circa 1975:
1. Check it's the allocated aeroplane.
2. Kick its tyres.
3. Strap in.
4. Start it up.
5. Examine cockpit for switches:
6. Move any shiny ones to the opposite setting on account of the fact that they're obviously moved very often.
7. Don't touch any rusty ones as they're obviously never moved.
8. Check-in anyone you're in formation with on Guard
9. Tell the tower you're taxying.....
10. Take-off
Hence "Kick the tyres, light the fires. Move the shinies, leave the rusties, brief on Guard, last one airborne's a poof....."
No - of course I'm not being serious. You NEVER brief on Guard!