A good night's sleep can depend on many things. Finding exactly the right bed is probably amongst the most important factors.
Personally I like quite a firm bed. I also like to sleep without sheets and blankets; provided that it's warm enough. In Summer I also like to have the windows wide open so that there is always a good flow of fresh air (with Mosquito netting, of course).
In Winter I creep under a thin duvet, but I continue to like the fresh air.
Unfortunately none of this has yet allowed me to sleep for more than about 4 hours per night. I haven't slept a whole night's sleep for maybe 40 years, and I'm beginning to get a bit miffed. I refuse to take sleeping pills, or follow some mumbo-jumbo magic, but I would like to find a simple formula that would give me just a couple more hours. I'd be quite happy with 6 hours non-interrupted sleep.
In the meantime, I wake very early, listen to a load of political tripe on LBC Radio, then get-up to have my first cup of coffee at 5 am. It is now 5.25 am and I'm up and about.