There is always a way to pass a drug test.
1. Put some water in the cup before you piss....
2. Get some bleach under your fingernails and piss in your hand lol

not always a good way to do it tho...
3. Drink a lot of water and piss a lot. If you can piss 15/17 times the day before and 2/5 times before your test, you should able to pass.