Hi Sue,
Like some others above, I ...
* shoot wildlife (therefore often many very similar shots to avoid focus misses, clipped wings, winks, etc.)
* download in to a specific 'shoot/location' folder
Although at an air-show with car parade, I might separate the planes from the cars in to different folders
* cull immediately after downloading
* star rate those not culled on the first pass, especially:
the best ever ones = 4 stars
the obviously good ones = 3 stars
the ones that need lots of PP help = 2 stars
the ones that are unusual, but not technically great = 1 star
which leaves quite a few un-star rated ones I ought to delete, but rarely do
* often cull only 30%, which leaves me with too many to handle
* also find the failures useful to keep as an example of how not to do it
* use filtering on star rating to limit my shots for PP choices to a more manageable number
* rather than separate pictures off into different folders to group shots together (like the cars, or bird species), I rename the files, then re-sort the folder, which groups them together and allows me to see all the herons together no matter when I shot them through the day
HTH,