How can you wake up feeling rested, alert and not groggy? Try the 90 minute rule method, scheduling your sleep time in blocks of 90 minutes so you can wake up in harmony with your natural sleep cycles.
Professor Richard Wiseman’s latest book, Night School, explores the surprising new science of sleep and dreaming, and reveals how to make the most of the missing third of your life.
Don’t want to do the math? Get a 90 Minute guide to help with your sleep routine.