Be sure to install all your wall cabinets first, beginning in the corner, working your way out. Don’t forget to install end panel covers to the sides of your wall cabinets that will show, especially if you intend to use a blower or microwave hood. If you don’t, the unfinished cabinet sides will be exposed! Base cabinets should be installed after wall cabinets, again beginning in the corner and working your way out.
If you finish installing all of your cabinets, and there is an odd space left that is too small to accommodate a cabinet, it is time to install a filler. Fillers come in two widths, 6” and 3”, and can be cut down to fit the width you need. Small gaps from ½-3/8” wide can be covered with scribe moulding.