Practice, Practice, Practice
When I am consulting with a client, and navigating on my machine they are absolutely stunned at the speed of me using just the GUI. I have to remind them: I’ve been using GUIs for 30 years — starting from the very first Macintosh, and using various OSes since then (from BeOS to X-windows and back again). Given my use “cross-training” and approximately 40,000+ hours (conservatively) of using practically every type of app, I’d think I would be an expert at efficiently navigating almost any app. As a side effect, I have also gotten very good at spotting good and bad UI. If I don’t know how to do something: I usually know the magic words and the search terms to use. If even I cannot find info quickly, then something about either your apps and/or your documentation is lacking.