First, guitar players must make sure that their fingers are squared as much as possible. When fingers begin to flatten, more than just the fingertip will touch a string, and this muddles the sound. The joints of the finger should make a sort of box with the fingerboard serving as the fourth side. Flat fingers muffle strings and prevent them from making a clear, crisp sound.
Second, finger placement matters. While most amateur guitar players understand that they should not place their finger directly on a fret, which causes metallic vibrations, they may not understand what comprises the best placement. Pressing midway between the two frets can also cause a twang. Ideally, the placement should be at about the three-quarter mark toward the fret needed for the chord.
Third, pressure is important. Pressing too hard on a string causes stress in the hand. However, not pressing hard enough can also be a problem. When fingering a chord, players should strive for even distribution of pressure among all fingers without pushing too hard. Getting the feeling for a chord largely just takes practice.