The tuner is a training tool. Nothing more, nothing less. Anyone who stares a tuner when practicing is doing themselves a disservice. Tune to your preferred tuning note and set the tuner to one side. You can leave it on and glance at the last note you play to see where your pitch may have drifted to. Here is something to remember. How good is the microphone in your $30 tuner? If you think it is state of the art, you are very mistaken. My $45 tuner often reads the harmonic. ie: if I play a concert G on the Bb, it will very often say I'm playing a concert D. Your goal is not to play every note in the green. Note of chords must be adjusted and that is learned by performing with others who, hopefully, can play in tune with each other. That is done by training your ear. I was quite fortunate in the fact my high school had a Strobo-Conn tuner. It had a great microphone and I used it as often as I could. I trained my ear by playing a note and watching the harmonic lights of the note light up. I learned that the more harmonics that lit up my sound got better exponentially and my intonation became second nature no matter where I was in the chord. Another mistake folks can make is putting a tuner on their stand when everyone else is playing. How in the heck can you be sure what you are getting? Maybe some of the out of tune trombone 10 feet away or the saxophone wailing away directly in front of you? Sitting in a band, orchestra, or small group that can play in tune with themselves is a great joy. Conversely, playing in a group that cannot and will not make proper tuning adjustment EVEN WHEN THEY ARE TOLD THEY ARE OUT OF TUNE makes for a very tiresome experience. As Bud Herseth said, "If a note sounds beautiful, it is in tune and vice versa". Rich T.