One method I've found very helpful is not to edit / make a selection straight away.
While I'd like to be better organised I usually find it takes a few weeks after a trip till I get time to sit down and have a proper look through my photos. By that point a lot of the initial emotion related to the photos has subsided. Obviously they still bring back great memories but I can look at them much more objectively.
I use Lightroom (I've no affiliation to Adobe) and go through my photos using the X and P keys - X rejects a photo, P picks a photo. All the X's get deleted, only the P's get edited. (Everything else gets left to sit on my hard drive 😅).
The edited photos, might not be a great representation of the trip itself, but they're the ones I like.