According to master chemist Walter White of Albuquerque, NM:
1st Rule: Respect the chemistry.
2nd Rule: RESPECT THE CHEMISTRY.
3rd Rule: If you threaten the chemist or his assistant, the cook is over.
4th Rule: Only two guys to a cook.
5th Rule: One cook at a time.
6th Rule: Haz-Mat coveralls.
7th Rule: Cooks go on as long as they have to. (Exactly measurable by the mass and/or volume of the components and the time of the reactions thereof.)
8th Rule: If this is your first cook, you HAVE to clean the equipment.