The Ten Crack Commandments:

Never let anyone know how much money you have.
Never let anyone know your next move.
Never trust anyone.
Never use what you sell. ("Know you've heard this one before, never get high on your own supply")
Never sell where you live.
Never take credit.
Keep your family and business completely separated.
Never keep any crack on you.
If you aren't being arrested, stay away from police.
Consignment is not for novices