There’s more than one way to tune a guitar, you know. The standard low-to-high EADGBE tuning has been commonplace for ages, but plenty of familiar songs take musically fascinating advantage of a variety of alternate tunings.
When tuning your strings, tune them up to pitch rather than down to pitch. Tuning up rather than down results in more stable intonation.
Absent an electronic tuner, you know how you can get your instrument to a point where it’s at least in tune with itself using the harmonics at the fifth and seventh frets?
Quick question: How is a ukulele tuned?
Quick answer: GCEA.
Once in a great while, a technical innovation comes along that’s so simple and yet such an incredibly good idea that you wonder how humanity ever got along without it.