This is an oddly weird thing to be dishonest about.
If anyone has an issue with me blocking some focus time to get things done, I'm happy for them to take it up with my boss, challenge my priorities and see what happens then.
The reason for asking was that I expect she knows you best, and she might give the most direct and tangible advice on what to improve.
I'd work on these aspects first, then move on to some suggestions in this thread.
Something that has worked for me is to keep a list of mistakes I made in the past, or improvements suggested to me. I use it as a form of checklist to go through before sending off a new document, to at least avoid mistakes I've made in the past.