Joel's method worked for me: singing an ascending run of notes into the soundhole, until you get to a note that really makes the uke resonate, then try tuning to that. I did it on a spruce top concert, which was already pretty nice, but not a knockout. When I tried this, it really resonated bigtime at F#, which would be the 4th string in a B tuning. I dropped all the strings down a half step to B tuning, and the difference was very noticeable: a much sweeter tone, and seemingly louder too. In my quest for better sound, I had been thinking of changing the Worth Brown strings, but it sounds so good, I'm gonna just leave it alone for awhile, and enjoy it. I mostly play/sing solo, so matching up tunings with others is not an issue. Thanks for that tip!
Next, I was planning on trying a set of high G strings on my vintage Martin soprano, but might try Joel's method first on that one too.