Agree with the above - you should go out and find what works for you, but it doesn't hurt to have a point to start from..
I fly my approaches at 100kts. As soon as I am given vectors or I am 5 or so from the final approach course, I pull back to 16" at my cruise RPM (2350). Sometimes I will slow down even earlier if the controller sounds busy and I want to make sure that they give me a comfortable turn to intercept. Similarly, if I am flying a transition, I try to be at those settings before I arrive at the first transition fix. This usually gives me 120 kts.
Once I intercept, I pull back to 12" and run my prelanding checklist, which includes a 'full forward' prop. At straight and level (for me at least) this gives me 100 kts. Once I cross the FAF or I intercept the GS, I add a notch of flaps, which keeps me stabilized at 100kts on the way down. I find that at the bottom at that speed, it is a very comfortable transition to a landing configuration, which for me is a cross-the-fence speed of 75kts.
I suspect everyone will be a little different, but that's how I do it.. Hope this helps.
Jon