Use Ikea Knuff magazine files as under sink storage holders. Screw a magazine file holder to the inside of kitchen cupboards. Add space to store more bulky items like chopping boards, cleaning products etc.
A lot of laundry rooms have a narrow wasted space either next to or between the washing machine and dryer. To take advantage of this space, build a simple plywood cart on fixed casters to hold detergents and other laundry supplies.