I very consciously want to avoid CV 'padding' but I wonder whether training courses might be considered relevant? Some job specs are so broad that it's difficult to tailor your CV.
These sorts of training course are highly specialised (e.g. handling and packing museum objects) but none ended up with qualifications. There are 6 courses in total and only one of them entailed a competitive application.
Alternatively, I could extract some of the stuff I learnt and put it in a 'Skills' section near the end of my CV.
My CV is otherwise pretty decent (couple of short-term research positions, articles, grants, conference papers, etc).