How do I fix a leaky faucet myself?

Yes, this is totally a beginner DIY fix and you'll save $100-200. A dripping faucet is almost always caused by a worn-out washer or O-ring inside the handle. Here's how to do it: 1) Turn off the water supply valves under the sink (there are usually two — hot and cold). 2) Open the faucet to release any remaining water. 3) Remove the handle — there's usually a small screw underneath a cap (pop the cap off with a flathead screwdriver). 4) Use a wrench to remove the packing nut. 5) Pull out the cartridge/stem and you'll see the washer or O-ring at the bottom. 6) Take the old one to the hardware store to match it exactly. 7) Install the new one in reverse order. Total cost: $5-10 for the parts. If this doesn't fix it, the cartridge itself might be worn and needs replacing (about $15-25). One tip: take photos at each step so you remember how to put it back together. You've got this!