How do you sleep?

Sleep we all do it don't we and I have just realised that we all talk about it and things related to it all the time, how tired we are, the lack of sleep we have had, the dreams we have had, what time we go to bed, what time the kids go to bed, what time we get up, how well we slept we talk about it all lot. We all sleep very differently in array of positions and for various lengths of time. So how do you sleep and what is the key to a good nights sleep? Firstly I think a good nights sleep starts with your bed and mattress. But what do you go for there is are so many to choose from.
Traditional Spring system, pocket springs, pocket memory and memory foam and that just the mattresses, the choice of bed frames is endless, leather, metal, wood, in thousands of designs, then there is a array of divans with different mattresses. Were do you start? There are a number of online bed stores to choose from some better than others but all will supply you with a bed.