You need pH test strips. Not the fancy electronic kind—just the little paper strips. They cost about ten bucks online or at a pharmacy. You also need a cup (for pee) or a clean mouth (for spit). And a sense of humor.
Pro tip: get strips that test a range from 4.5 to 9.0. The cheap ones for pools? Useless. You want the body-kit ones that look like tiny, nerdy rainbows.
