My silk eyemask totally changed how I sleep. Best $10 I ever spent. For me, my problem is I tend to sleep in later so when the sun is out, sometimes it's hard to get woken up midcycle.

https://www.amazon.com/gp/product/B00GSO1D9O/

Also, noise is usually a problem for me. I keep a fan running at night to provide a good background hum of white noise to help drown out any external sounds.