Chord Voicings Without Fifth
When constructing chords, try the difference of leaving out the perfect fifth of the chord and having it in. Due to the fact that the fifth will be quite a strong overtone of the root (=usually the bass note) anyway, it will be present in the chord quite strongly without actually having it in there.
This is especially true with string chords that do have a very rich harmonic structure. In some cases, having the fifth in the chord actually makes the chord thicker and less transparent (due to the additional overtones that will be created by it).