Thanks both, for the suggestions.

Unfortunately my phone is an old one with no voice recording ability. Maybe it is time to do a serious upgrade, I will have to see what I can afford.

I have tried the keyword thing, but I tend to wake up to find that the keywords are cryptic, mean nothing to me and I can't remember anything related to them; it's as if someone else wrote them. Nevertheless I like this idea and will keep doing it. The trick lies in finding the balance between how much I can write and how awake it makes me. If only I didn't have such trouble falling asleep!

I am not quite sure I understand your other suggestion, CL but I will read up about it. I really have to find something that works.

I have woken up after 6 hours for a WBTB but feel wide awake and will have trouble getting back to sleep now. How long can the waking period be before the chance for long REM sleep is lost? I might get tired in about 5 hours time, will that be too late?