ds2 and ds3 are both on the autistic spectrum and the biggest help I have found is printing off their timetables and sticking them on the kitchen cupboard
ds3 had a laminated check list to go through (about the size of a bookmark that was kept on his desk in his room) before going out the door, eg phone, train pass, sports bag, organiser etc (bag always packed the night before)
School also sent home a homework timetable so we knew what subjects were set on which days in case it wasn't written in the book. PE was highlighted so they knew when to pack thier kit. School also has a homework section on the website which allows parents to see just what tasks are set. If there isn't a page on the school website be sure to ask the senco for a homework timetable
If possible get a plan of the school and print it off and go over it in the holiday with your dd marking significant places such as loos, tutor room, canteen etc
If the school office is open at all during the holiday ask if you and your dd can go in for a recky while it is quiet so that your daughter can be more familiar with the layout come september
The other thing I did for the boys was to create a velcro strip on the freezer for each of them (including ds1 NT) which was used to keep track of homework. In the organiser there is usually a place to tick it once it is done but I found that the pages got rather busy and the velcro strip worked better
The way it worked was that each subject had one or two laminated symbols about 3cm square. they were held in a bowl on the top of the freezer. Each time a homework was set, that subject got stuck on the velcro strip so that it was clearly visible. Once the homework had been done, the symbol went back in the bowl.
I found it worked best when I made sure that the symbols were prioritised in the order that the homework was due in.
It was a bit of a military operation but it worked really well for us.