Here's a list of little helpful things I carry in my left front pannier pocket:-
- fryposer - freezer bags, 2L, really useful for storing rubbish from roadside meals, and emptying food into from each small shopping trip. Double-bag your Dolmio pasta sauce, though.
- Post-It notes - I try to learn 10 words and phrases each day from my Teach Yourself Norwegian book; they get copied onto the yellow sticky, which is stuck to the map I'm using in the Ortlieb map case on the handlebar bag. Also very useful for sticking to the door of the hytte as a reminder to empty the freezer tray if there is one.
- Pampers baby wipes - for full-on personal freshness if wild camping where water is in short supply. Actually the alcohol-based ones are better, but come in larger and less convenient packaging.