Use correct lights: You do not want to taxi with stobes on, for example. Although light is currently not very bright on IF, try to simulate the real usage. I hope more and brighter lights will be added in next updates.
Checklists: When I can, I follow IF ones, such as those made by @Harry . Makes you more active when flying, and looks really professional.
Imagine real passengers: Thing that you are a real pilot, and care on passenger comfort. Your flight automatically becomes smoother.
Well, I don´t know what else to say at the moment, and I hope my post is right…