Well for me it depends a little if I have company. In general I always used to sleep in the centre of the bed on my tummy but since I have had breasts (B+ heading towards C Cup), sleeping on my tummy is out. At home I have a Queen size bed and tend to sleep on the right side (left as you look at it), unless I am travelling on business (then I always book a King size bedroom). Then I sleep in the middle. I also sleep on my left side (thats how I start when falling asleep). If I am on my own I like to wear PJs. The Airline I tend to fly in on International flights gives really soft cotton PJs to travellers in Business Class and I have maybe 20 sets so thats what I wear when alone, but if I am sharing my bed with a friend, then I always wear a Nightie - normally Baby doll - for ease of access to my companion.). If I am on my own I tend to also have a nice long bolster in the bed. I normally buy mine in Hong Kong or China as they generally have nice firm ones there with plenty of pretty colours available. When I get into my sleeping position, I always cup my left breast with my right hand and gently give it a nightly massage until I fall asleep (if I am on my own). If I am with a partner, I try to encourage them to do the great massage thing. - the trouble is that tends to lead to other things! - not including sleep as intended!