Need Dilution Advice

I have a drug test between 9 am- and 3 in the afternoon towmorrow. I smoked a few bowls on wednsday. And today I have been drinking water like it is going out of style, and its already water clear. I have some vitamin B pills I plan on taking to make my piss yellow is there anything else I should do? Is there anything I shouldnt do? (besides not smoking)
Thanks
Chuck

aspirin a few hours before the test, do some research on the forums and you'll find what works best. All i can say is replace what you piss out by drinking 4-8 oz's of water after you piss and do the pills 2 hours before so your piss doesn't look too unnatural.