I keep a “Template” Library on all my systems, with some Smart collections that I drag/copy into new Libraries:
Timelines. aka projects. BUT, the Smart Collection filters out any with the name “Snapshot”. I mostly use project snapshots as edit “temp backups” as I progress down different rabbit holes. Generally though, I don’t want to see ’em mixed in with the rest of the Timelines (ahem, Projects).
Comps. Grouped clips. I’m an old-school AE person, so they’re called Comps, dammit.
Audio.
Stills.
Multicam.
For larger projects, I’ll use Smarts to do things like; “show me broll from this location”. (keywords = broll, location_name). Or anything else I might need. I find my “level of keyword detail” increases on larger projects, to allow for more granular searches as it progresses. On these projects, I try to keep in front of adding basic keywords (“broll”, “on cam”, “interview”, “steadicam”, “aerial”) as I ingest. By having enough to do a top-level clip separation, it makes it faster to add more detailed keywords later on, if desired. Sometimes adding a camera name to a Smart collection helps get the result. Etc.
I don’t know if I’m spending more or less time organizing, but I can confidently say I’m spending LESS time looking for shots than in Legacy.