I haven't read the book, but I find drinking a coffee immediately upon waking from a nap clears the post-nap fuzzies pretty fast. Someone once told me coffee before the nap is better, since the caffeine takes around 20-30 minutes to have an effect, so it hits you right as you wake. I find the smell and taste of coffee stops me getting to sleep, though.

Can you elaborate on how your sleep schedule was impacted by reading this book?