projectnamev1.0YYYYMMDD.psd - WIP projectnamev1.0YYYYMMDD-final.psd - Final
Good communication with the customer tells me when something is "final". Once I've named a file "-final.psd" and there's any changes made, then I increment the version number in the filename - "projectnamev1.1YYYYMMDD.psd"
projectnamev1.0YYYYMMDD.psd - WIP projectnamev1.0YYYYMMDD-final.psd - Final
Good communication with the customer tells me when something is "final". Once I've named a file "-final.psd" and there's any changes made, then I increment the version number in the filename - "projectnamev1.1YYYYMMDD.psd"