The most critical step is to turn off the main water supply to your house or, if available, the specific shut-off valves for the bathroom. This prevents flooding and ensures you can work safely without unexpected water bursts. Always verify the water is off by turning on the old fixtures before starting removal.

While an adjustable wrench and screwdriver are core tools, you'll also need plumber's tape (Teflon tape) or pipe thread sealant for leak prevention. A utility knife can be useful for cutting old caulk if your escutcheon plates are sealed, and a headlamp can improve visibility in tight spaces.

Yes, this project is generally beginner-friendly if you follow instructions carefully and prepare properly. The 3-hour estimate is realistic for a straightforward replacement without major complications like seized pipes or unexpected plumbing issues. Allocate extra time if you're new to DIY or encounter unforeseen challenges.

The most common mistake is not applying plumber's tape or thread sealant correctly, or over/under-tightening connections. Always wrap plumber's tape clockwise around threaded connections 2-3 times, and tighten fittings snugly but avoid excessive force which can strip threads or damage components.