If you're installing a new kitchen, you'll need to decide how to attach the toe kick. The toe kick is the horizontal piece of wood that runs along the bottom of your cabinets. You can either glue or nail it in place.
Glue is the easier option and doesn't require any special tools. Just apply a generous amount of construction adhesive to the back of the toe kick and press it into place. Nailing is more secure, but it's a bit more work. First, predrill holes through the toe kick and into the cabinet base. Then drive 3-inch finishing nails into the holes. Be sure to countersink the nails so they're flush with the surface of the wood.
Either way you choose to install your toe kick, be sure to caulk along the seam where it meets the flooring. This will help prevent water damage and make your kitchen look neat and finished.