Scope: UK-wide design considerations. Practical considerations to adapt to your own home and circumstances.
Count the things before the cupboards
Choose one problem area and list what accumulates there. Separate frequently used objects from occasional equipment and items you no longer need. Measure the awkward pieces: a vacuum, suitcase or folding buggy can determine whether a cupboard is useful. Buying storage before understanding its contents often creates a second problem.
Put convenience where it matters
Daily items should be easy to retrieve and put away. A high shelf might suit spare bedding but frustrate someone trying to find a work bag each morning. Position storage around the route through the home, especially at entrances and transitions between rooms.
Use the whole dimension carefully
Under-bed drawers, shallow shelves and fitted storage around an alcove can be useful where conventional furniture wastes space. Check access, ventilation needs and clearances. Do not cover vents, meters or necessary maintenance access simply to achieve a cleaner-looking wall.
Leave some room empty
Storage should improve circulation as well as capacity. Preserve a clear route through narrow rooms and avoid doors that collide with furniture. Open shelves work best when you are comfortable seeing their contents; closed storage may suit visually busy areas, but it still needs an internal arrangement you can maintain.
Try a low-cost experiment
Before commissioning fitted furniture, use boxes or movable shelving to test where things naturally belong. Live with the arrangement for a week and note what returns to the floor or dining table. Those recurring objects indicate where the system is inconvenient. Give every frequently used item a realistic home. A simple arrangement you will keep using is more valuable than a photograph-ready storage system that requires constant rearranging.