Very surprised I didn't see this mentioned already: make sure you don't have any kind of sleep problem.

If you wake up feeling unrested, look tired, struggle with energy or sleepiness during the day, or otherwise feel like something might be 'off', then it might be worth exploring whether or not you have a sleep disorder.

That could take the form of insomnia, OSA, or even something more subtle like UARS.

Not many sleep labs are good at evaluating patients, so I would recommend going to the Sleep Disorders Clinic at Beth Israel Deaconess Medical Center if you want proper diagnostics.