1. Watch out for anything plastic during an Auton invasion. You wouldn't think plastic dolls would be so much trouble. Troll dolls are especially evil.
2. Stealing bits of the Master's TARDIS makes him angry.
3. Never underestimate the efficacy of stink bombs against medieval bandits.
4. Don't promise Florana and deliver Exxilon. Your companion will attack you with whatever is handy (beach balls, umbrellas, etc.)
5. Use the Whomobile sparingly. It makes Bessie jealous.
Append this to previous lists when you find them