One thing I learned from DD when trying to be extra-nice to her because she had failed to get any of her school choices was that the absolute worst thing was getting one of those 'moving up' books
. Each child is an individual, of course, but she said that it just made a big deal of things which really weren't.
As well as the 'school' organisation things, make sure your DD knows her route to school, bus times etc if relevant. Cut her a bit of slack - initially you will probably want her to come straight home at the end of the day, but there is a world out there that she and her friends can safely explore. It is also useful to have a good relationship with e.g. shops where they can turn for help if necessary. I once had to leave our then 8 year old DS2 in town for two or three hours in the care of his 13 year old brother and his friends and we decided that Holland and Barrett was to be his his refuge to go to to phone DS1 if he got detached from them - relatively quiet and kind, helpful staff. Apparently it only happened twice