I'll be honest with you. Golden Seal, Niacin and all that other shit doesn't really work. Most THC is stored in your fat, so your best bet is to start drinking water and sweating a shit load. There is no need to start drinking water 3 days before hand, all that's going to do is make you sick. The day of the test, start drinking lots of water and if you're worried about the color then take some vitamins (like the B group). As for the test, make sure you take your sample in mid stream. The dirt comes out first. I'll try to find you a website where they had everything about testing, but save your money.