Off the top of my head. Yes there are some things.
1. Tinted helps reduce reflection.
2. Dark colors dont reflect as much.
3. Gloss reflects a lot.
4. Glass reflects a lot (instruments)
5. Lights reflect a lot (EFIS's, moving maps, annunciators, etc...)
You would have no reflection if you painted everything black, installed a black interior, and covered up your panel. But you might look silly and you might crash
My wife likes to take photos so I tried to help her with tinting and dark colors, but we still see reflections off the canopy from time to time.
Best,