It can seem overwhelming, can't it ?! but you sound like you are doing really well and have everything under control !
If you let us know the area you live in and the schools your dd will be trying to get into...I think it makes a difference to the papers etc ? and then I'm sure someone will come along who will have more individual advice for you !
I tutored my son last year ( he passed with a really high score ) and my next one will be taking the Kent test in 2012. Of course it's different for each child...i.e their strengths and weaknesses . My son isn't at a particularly great primary and I had to spend a lot of time catching up before I started the 11 plus prep. I noticed with the maths how important times tables are, they crop up everywhere...so they really do need to know them back to front ! and then it's just focusing on bits they don't understand and then practice, practice, practice ! I don't know what your maths is like, but I found it hard explaining fractions etc so my friend who is a maths teacher did some work with ds for a couple of months before the test. Lots of reading is a must too...not sure what the english paper entails as my ds didn't have to do one.
The bond books are great for practice...I didn't start the papers until about 2-3 months before, but I didn't want my ds to get fed up and burnt out, if you know what i mean !
Pushydad is right ....it depends on your child re the amount of time you practice.Maybe you are in a highly competitive area ? I didn't want to push, push , push my son because I just knew he would just get fed up. I think little and often works better for him...but of course it is individual.
Good luck with it all !! On a different note, self tutoring your child is really special...My son and I bonded really closely through the ups and downs and I really think it changed our relationship for the better ( I like to think ds would agree !