I suffer from Restless Leg or, in my case more accurately ILM (Involuntary Limb Movements), which means that I have no difficulty falling asleep but, most nights, am jerked awake again within minutes with one arm and one or both legs flailing. This does not stop until I get up and walk about for a half hour or so, then back to bed, fast asleep and wakened again in an hour. The walking about bit is why Americans call sufferers 'Night Walkers'. It is a nocturnal condition - I can 'Sleep for Scotland' easily and quietly between say 7.30am and 7.30pm but unfortunatley most things I need to do, eg Child Minding, Shopping, Attending Meetings, have to be done in daytime hours. I do manage to wash, iron, bake bread, make soup, etc. in the night.
I have, of course, tried every remedy that has been suggested to me, without success and have got to the stage where, if one more person kindly offers a simplistic 'don't drink coffee after tea time' remedy, they are liable to be throttled. I usually have no problem falling asleep, (it is the staying asleep that is the problem) but I have one 'works for me' suggestion that never fails to send me to the land of nod and that is to picture myself curled up in all the beds I have ever slept in, from my childhood twin bed, through bunk beds at Butlins, double bed in attic at Granny's, homes and hotels - very soporific. zzz