While I haven’t gone so far as to attribute a numbering system to my organization, I have done well at organizing things into red-line distinctive categories. T

While I haven’t gone so far as to attribute a numbering system to my organization, I have done well at organizing things into red-line distinctive categories. The idea is to create categories that _cannot_ overlap. If there’s any commonality between them that’s not useless, they need to be grouped at a higher level. As an example, if you’re organizing your toolbox, you don’t mark a drawer “hand tools” because it’s a useless categorization. You mark one “socket tools” which will include everything from the sockets and wrenches themselves to adapters that connect a socket to an impact wrench (but an impact wrench does not go in there because it is not exclusively a socket tool). If it really does come down to something that may really fit in two categories (hey, there’s always exceptions), you put your mindset in the place of yourself when you want to look it up: what’s the most common situation in which you’ll be looking this thing up?