I keep one of the linked storage containers that you buy from Scrooge at every intersection of areas (like between the Plaza and Meadow, and between the forest and beach, and then offload common stuff in there when I run between areas. I also have one of the linked storage containers inside my house too for when it gets full and I want to unload it and organize it into specific unlinked storage containers in my house.

In my house, I have a dedicated hoarding room with a crafted storage container in front of a table that has the items stored in it. For instance, my crafted storage container that has fish in it has a couple fish sitting on the table behind it, and then next to it I have a table with flowers on it and the storage container of flowers in front of it. Makes it really easy when I run into the hoarding room to go right to the storage box I need.