Any tips for making it easy to find documents on Sharepoint?

3 Spice ups

You can start by checking this articles:

Enable Site content to be searchable

Enable content to be searchable

https://support.office.com/en-us/article/Enable-content-to-be-searchable-d7ba92db-8618-43fe-87ee-adf03d973062

Filters

Apply templates on site. When capturing or importing the template will apply business logic related to the process and in return assist finding content after storage.