lizzie50 and shysal- I am sorry to hear that the pair of you have problems sleeping. I am not sure what to suggest because normally I sleep like a log even when I get up to go to the loo at least twice, I go back to bed and instantly fall asleep.
I do try to go to bed around the same time each night. I cannot sleep without reading first and that could be for over an hour although I decided ages ago that the switch off time was 12 midnight.
I have a memory foam mattress and pillow and being permanently cold in bed, my duvet is 15 tog!!! I no longer share my bed with anybody other than my cat at times so that may make a difference.