Locate and mark wall studs
Measure and mark cabinet placement lines
Check for level and plumb reference lines
Remove cabinet doors and shelves if needed
Drill pilot holes through the cabinet back or hanging rail
Position the first cabinet on the layout line
Shim as needed to make the cabinet level
Clamp adjacent cabinets together if installing multiple units
Fasten the cabinet to the wall studs with appropriate screws
Recheck level and plumb after fastening
Install remaining cabinets, aligning faces and tops
Secure all cabinets together at the face frames or sides
Tighten all mounting screws
Reinstall doors and shelves
Fill gaps with trim or caulk if needed