If i were you i would most definately not smoke, and i have been sober for toooooooo long due to testing. I used to beat weekly home tests by drinking lots of water (the day of the test of course), grape juice (again the day of the test), and consuming vitamin B. (I used to take multivitamin tablets which contained naicin and other ingredients which are in those detox drinks which clean out your system). But if you do that it is reccommended you drink a lot of water because it turns your pee very very very yellow. Also add a pinch of bleach granules. Good luck. rkd