Practice, practice, practice
When a new MSP first gets their camera I'm sure there is a lot of excitement, and some anxiety because the technology is new to them. With the cost of the equipment, subscription and per model charge, we all pay attention to our costs.
But one cost is an investment. The cost of practicing different techniques of scanning and marking the minimap. Most likely practice on their own home or perhaps a friend or a neighbor.
Once you make a model, create a couple copies of it and practice going out an exterior door to capture some exterior scan points. These can be done most easily nearest sunrise or sunset, heavily clouded days. You can also have good success when the sun is at its highest peak (12pm-2pm). Practice at each different time frame to see the results.
Purposely mark a couple windows the wrong direction to see the result. Don't mark a mirror on an exterior wall and don't mark a couple windows to see the artifacts/scatter that is prevented with proper marking. (You can actually use 1 window marking for an entire side of a building or wall instead using separate markings.)
Mark with and without trim to see what happens. (Generally the only time I use trim is if I have exterior scan points included in the Space.)
Try scanning without marking mirrors and see how it goes. Mark a mirror in the wrong direction and then scan and see if you get alignment.
Practice different distances from closed doors to see how far away you need to be so they are 'open' to walk through. I've found that often scanning a door open first, and then closed allows it to 'open' closer to the door and still be able to walk through it.
Intentionally scan a door with the door in different positions as you approach. Approach a door with it open, scan, closed scan, open, scan to see what happens. Use the Mesh mode to see if there are artifacts hanging in the way.
Leave out (or delete) a key scan point to see how it impacts navigation.
All it really takes is time, because there is no processing fee for processing copies. Just be sure to delete any models you don't want to keep.
Here's an example of what can go wrong if mirrors aren't marked properly and one isn't paying close enough attention scan alignment in the correct place.
Mirror & Alignment mess https://my.matterport.com/show/?m=BMUFUCyKQii