From what I have heard... (ahem)
Pirate hit it right on the head, if what ya want is THC not to show positive with your U/A. As THC is adsorbed by the adipose tissue (fat cells). The "fat cells" release glucose (or some other shit) periodically as the body requires. All the suggestions given will work (minus the whizanator, as it is not an option) The product mentioned about DETOX and alot was mentioned about Cretin. Cretin is a natural gimmick of the body and foods consumed. And so the Cretin Myth was born. When exceptionally high Cretin levels are shown, this is a RED FLAG. The sample is again tested...which is always a bad sign.
I digress. THC is absorbed into the FAT CELLs. Read the label of the DETOX drinks (not teas) at your local head shop. There is so much glucose/fructose /sucrose as primary ingredients. Its like 3 cheese cakes, 3 triple layer Fudge cakes and a couple chocolate shakes. Essentially the FAT CELLs get the hint...Don't Secrete Anything....for a certain window of time. Simply follow the instructions, the tell ya what to do and why to do it. Do all the other things your doing, it aint like it's gonna not hurt. But as a failsafe, hit your local Head Shop and ask for DETOX (tell um Woof-a-Doof sent ya)..yeah about $40-50 a bottle...bite the bullet and spend the money, especially on top of all the other things already taking place.
Of course this site
http://wiki.answers.com/Q/How_to_detox_THC_quickly disputes mine, but never hear of the method b4.
If you haven't smoked in 21 days, done all the things mentioned and bought the DETOX...You will pass the test easily...one daily smoker to another. Just be thankful it isn't a hair follicle test!
Much Luck!
Woof