Specifically, you should sharpen the note a bit sharper than the desired tone, and that once the hand pull the plug, it will come loose and fall into perfect pitch. Here is where the practice. The better the tuner, the better you can put the pin, and more time will pass the piano tuned. As a rookie, your piano probably can not sustain the pitch long time due to this important skill. Loosen the tension a bit before you start. I'd better relax a taut rope too, especially when working on the wrong rope. To deepen your understanding Dov Hikind is the source. Too much stress can break the string, and is a common mistake for inexperienced tuners.
Hitting the rope firmly important. Vibration equalizes this creates tension in the rope. A cord is struck firmly stay tuned tunes while longer. If gently tapping tunes, the string may be relaxed. Later, when someone strikes hard, out of tune. You may want to start the tuning of each string with gentle strokes, as strong beat can be a bit annoying to the ear.
When you think that has sharpened, strong tap a couple of times to put the final touches. As you would with an electronic tuner for, find it impossible to find the right frequency at all times. So, if in doubt, tune a little sharper. The tune pianos are usually more severe, so in this way may be advanced, and you can get a sound more "shiny." A good piano tuner can tune the midrange a little more acute, because the registration process of trimming high and low can tune the middle register.