If you're writing your own resume, I'd maybe sit down every six months to a year and think about things you accomplished, and write then down (problem solved, how it was solved, data if possible, impact, etc.). At some point you'll have a list of accomplishments, and you can select the more impressive of them to put on the resume.
(As an aside - this also helps with career stagnation. If you're having a hard time deciding what to write, it's time to move on.
Once you've got some accomplishments, refactor to the most efficient use of words. How can I say everything necessary is as few words as possible? This is where a professional might come in handy if you're not a good writer.
You can run your accomplishments by a friend and say "which two or three are most worthy of a resume inclusion?" - gives insight into what is impressive.
I think that covers most of it. The rest is mostly formatting and summarizing (if you choose to write a summary).
Neat, thanks it's very much appreciated. I did some digging and except from re-posted articles and CV builders it seems like there are not many tools to help with this. Which surprises me a bit given that I'd think many struggle to be effective in something I consider crucial to be successful in your chosen field.
