What to put in, what to leave out

Now life is about to change radically. I'm retiring after a fabulous career and moving with my family to the Highlands of Scotland. We soon settle into a new life, with a totally different pace. Instead of getting up at 4am and spending all day following a suspected murderer, I'm walking the dog, cutting wood, or mowing my big new lawn.

But I'm not yet 50, so the question arises, what do I do next? I have always loved reading, so with hours of time on my hands, I thought, "I wonder if I could write a book?"