Don’t suddenly change the user’s view [3]
Keep the user’s eyeline as constant as possible [7][9]
Let the user smoothly move their view
Keep the distance between related objects to a minimum [8]
Don’t freeze their view [3]
Make the user’s virtual body match their real one [30][31]
Add a persistent background if the world can be easily moved [36]
Avoid bright and flashing lights [13]
Make it obvious if you want the user to look at something
Avoid harsh color combinations [49]