I’ve found that scars from pipeline installation can be visible in USGS 3DEP data. Pipelines with a cleared cutline will be most visible, but less maintained pipelines are also often visible. I’ve even found long-distance buried telephone lines (according to old topo maps at least), but didn’t map those because I couldn’t confirm if they were still active.

There are some surviving boot scrapers near me, mostly on Colonial Georgian and Federal-style buildings. I could only remember the location of one, but I’m sure I’ll find more if I finish surveying for historical markers.

The tagging of boot_scraper=left/right/both makes sense, but it’s probably important to specify that it’s from the perspective facing the door.

The TIGER import in the US in 2007 used tags like “name=State Route 101” for unnamed roads with a route number. In OSM, that data should be stored in the ref tag instead, as “ref=NH 101”. No road is actually named “State Route 101”, so that tag should be removed when the number has been copied to the ref.

Satellite imagery can be quite busy, which makes it much easier to not see an area that you haven’t mapped, or an area that did not end up the way you thought it should. It might not apply to everyone, but it’s something that’s helped me.

A town full of address numbers is usually the more useful of the two, but if data collection is required, it will take a significant amount of time and effort. 6 is more about not trying to map house numbers and buildings and sidewalks and… all at the same time, especially over a larger area. Trying to map many topics isn’t necessarily bad, nor is trying to improve a large area. Trying to do both at the same time, I’ve found, leads to inaccuracy.