Change your diet. Intake a lot of healthy food(fruits) and less fatty food(cheeseburgers)
Run up until 2-3 days before your test. Sweating will help the the move out faster but it'll come out through your urine so don't so it the day of your test.
Buy a at home drug test. Test yourself beforehand
The night before your drug test drink a gallon of sweet tea. This will make you pee about 12 times/hr lol
The day of, buy a detox kit. I used herbal cleanse green clean detox kit. It didn't taste bad at all. Follow rhetorically directions exactly and after your fourth pee test yourself at home and you should be clean for about two to four hours.