I got some tubus racks they are way better than anything else I have used, both blackburn and tourtec, which both broke on me (probably filling them up too much! but not much fun in the middle of nowhere, cable ties and arildite works every time.) I don't get that problem any more.
Pocket pockets and more pockets you cannot have enough pockets, know whats in which and life is easy - well it was for me.
And as hippy says pack heavy low and most needed at the top - or in one of the pockets!
Get a self inflating thermarest, straigth to sleep and hardly any pain from stones in the back!
The advice goes on and on, i'll leave the rest till later