PPL to CPL Standard - Improving during hour building
I'm going to be starting my CPL training soon. In the mean time I need to do some hour building (about 35 to go). I don't just want to fly from A to B and enjoy the view but wish to improve and learn along the way. I want to be in a position so that when I start my CPL training I'm not caught off guard with any new concepts or techniques.
So for that reason I want to find out (preferrably from instructors!) the main differences in flying and navigation techniques from PPL to CPL standard.
What should I be aiming to do when hour building? Is it only a simple case of maintaining my altitude to within 50ft and speeds within the required limitations? Also, is there a better VFR navigation technique I should be using. Any thing I should know about Making Good Track etc...
Thanks