Don't drink more than about 48 ounces of liquid preferably gatorade 2 or 3 hours before the test.I usually drink cranberry juice and green tea.
I know on my UA's the urine is pretty pale yellow hardly decernable sometimes but the drug tech has never said anything. I know there's a way to get your creatnine levels up with red meat but you have to do it a couple days before the test for it to have an effect.I eat red meat all the time so I,ve never bothered with it. Also I believe you can get creatnine tabs from health food stores.