As a new grad currently on my 6th week of orientation. I am finding that feedback from my preceptor is the best thing that has helped me so far. I always like hearing when I am doing a good job, but I also like to know if there are certain things that I need improvement on. Little tips here and there about how to do things better or more efficiently is great.
If your orientee is not taking the initiative in asking questions... ask if they have any questions or if there is anything they would like you to go over with them. They might be too shy or embarrassed to bring things up on their own. It might also be good to ask your orientee what they think their strengths and weaknesses are.
I hope that helps a little. Good luck.