Hi Teresa, many thanks for a very interesting question!
Do you perhaps incline towards being a perfectionist? Because when we are perfectionists we tend to want to improve everything and set very high standards for ourselves. If that's the case, I'd encourage you to go easy on yourself - and this is an ideal activity to start to "let go" of some stuff.
Another way to look at this issue is to think what skillset you need for the job you're aiming for - and then think what areas are not worth working on in relation to your future goals.
But don't be too hard on yourself. If nothing springs to mind, just let it go! But at the same time make sure that you haven't set too many development areas for yourself!