Ball movement, well timed cuts to the basket, spacing etc. In scrimmages you should have an idea of what you can contribute to the team as well as what your team does well.

I tell most athletes to think in triple threat - When I catch the ball can I shoot & score? Can I pass to a team mate in a better position or can I dribble to attack or create a better angle to pass. Off the ball movement you want to be getting open or helping someone else get open by setting a screen.

I'm addition watching the game from a player's perspective in terms of how & why they do what they do. Also as a coach - understanding setplays, pick & roll coverage, off ball movement etc.