[jeffc]

Not everyone has perfect pitch (and I've been told it drives them nuts, as nothing is ever "perfectly" tuned).

I tune the B string on my guitar a few cents down for that bluesy-type note that's almost "there" but not quite.

I don't even want to think about tuning a piano. Three strings per key? Nuts!

[Larry Lucido]

If you hire Mr. Opporknockity to tune your piano, make sure he gets it right the first time.

Because Opporknockity only tunes once.

[Jeff Chandler]

I've actually tuned a few of my pianos when money was tight. I bought a book and improvised the tools. The wacky thing is that pianos aren't evenly tuned; they have a "temperment".

Amazon

[Gene Eric]

I no longer bother with audio tuners. Instead I’ll rough out each string by ear to a keyboard, then compare adjacent strings on the 7th fret using the 8th for the B. Before adopting this tuning method, it was the G that often required ongoing adjustment. After restringing, I’ll check the Intonation by comparing the 12th fret harmonic to open for each of the strings. If the bridge supports individual string lengths and micro tuners, all the better.