Be honest! That's the key to success!
Write them all you think they need to know!
If you read some news tell them to pay attention to it, maybe they didn't read it.
If you think they should do something better, if they miss some points, if they need points for statuses..help them.
Be their support. If they are doing the great work - praise them.
Tell them to feel free to contact you if they have any questions.
You'll be great! :)