I file them chorologically with full flight details of when during the flight I used the product, ie brushed my teeth, used the lippy etc.

Seriously, the various assorted bags I've collected over the years have gone to good use. As well as the ones already suggested here for cables etc, I have a very old (~10yr old) Molton Brown bag that has my mini first aid kit in it that lives in my man bag. Paracetamol, Ibuprophen, Immodium, antacids, antihistamine, First Defence and cold remedy snuggle up nicely in this kit. A hard sided one, from QF I think, protects a few adult items - or at least makes them easier to find in the dark....

I have a supply of the cotton weave eyeshades given out in J at the turn of the century. They are the only ones I've found that don't make me sweat when wearing them. They were a saviour to me when I had to spend a week in hospital a few years ago. Do they still have them or should I pack my on for my next J trip next year? (Also does J on BA give out PJs? Goint to South America, one day flight and one night flight so far - love the ones QF give out. So comfortable!)