The toughest part of replacing a kitchen faucet is removing the old one.Before disconnecting the drain lines, take a snapshot or make a sketch of the layout to help you put it all back together. If you're replacing the kitchen sink along with a new faucet, install the faucet before setting the sink into the countertop.
Iíve learned not to be impatient when replacing a faucet. I spray the nut underneath with WD-40 the night before and just leave it overnight. The nut is easy to turn the following day. It beats having to wrestle with a old stuck nut for hours.