One thing I do that I've found to be pretty helpful is to prefix files/directories with a number or date, for sorting. Some things are naturally ordered by date, for example events. So I might have a directory "my-company/archive", where each item is named "20170621_some-event".

Other things are better sorted by category or topic. For tools or programming languages I'm researching I might have a directory with items "01_some-language", "02_setup", "10_type-system", "20_ecosystem", etc.