+1 for sleeping without an alarm. If you really need an alarm to get up every day, you might not be getting enough sleep to begin with. Some of that is unavoidable (noises, light waking you up at night etc.) but a lot of people think they can get by with like 6 hours or less of sleep and just get by on extra coffee.

Taking a week or so to just let your body wake up when it wants (even if it means going to bed early, ugh) will help you figure out how much sleep you need.