i think the fact that you are on here opening a thread admitting that you are about to venture into uncharted territory and would like some advice says you can handle the transition. the main thing with jumping from a 172 to a high performance plane is to respect the extra oomph that you will now have. like someone else said planning your descents is key too. Realistically though theres not a lot too it, just make sure you stay ahead of the plane, the faster it goes the easier it is to let it get ahead of you, like traffic pattern ops.