My advice. read N2's guide for starter's...there are a lot of very good tips to succeed by dilution. draw out a guide for yourself. I'd start 12 hours before your going to be tested by taking 3-4 aspirin. four hours after that another 3-4. and then another 3-4 four hours after that (you should have four hours to go at this point). Use gatorade and chug 16-24 oz's. wait 15 as N2 suggests and take another 8 oz. , and so on for the next hour. (you should have 3 hours to go now until the test). At this point, wait an hour and just void that whole hour, you'll be pissing every 15-25 minutes depending on your body system, also, whenever you piss, replace that with about 4-8 oz's of water depending on what you've pissed out. After that hour (2 hours to go) you should be voiding completely clear urine, like water. load up on about 8-10 B complex vitamens. Also, pop 1-2 more aspirin just to be safe. Piss for another hour (1 hour to go now). at this point you'll want to do anything you've read that could be good. I recommend certo although others may disagree at this point, i have very close friends who swear by certo and it has never been tested to NOT work, so you might as well buy a liquid certo pack and chug it with some gatorade after your next void. for this last hour what your going to be doing is just voiding and replacing so your piss doesn't look to neon green like for the test. You want something that doesn't look like mountain dew, trust me. When it is go time for the test, give a midstream sample as N2 suggests. beginning piss in the toilet, middle piss in the cup up to the required amount, end piss in the toilet. simple as that. Hope this helps, i've used it a few times, pass pass pass. A big thanks to N2 for a lot of my guidelines.:thumbsup: :rasta: :rasta: