Fast & Easy EQ (with Subtractive EQ)
How to find and take out all those harsh and unwanted frequencies in your sounds and hear instant improvements.
This is especially useful for the beginner who has just started learning EQ and is unfamiliar with what characteristics are associated with certain frequencies in the Frequency Spectrum.
Also -- remember to trust your ears and your instincts! Sometimes a "harsher" or "unwanted" frequency just might be the characteristic that your sound needs to have presence and Cut Through your mix. It all depends on your intention and end goal for the sound in the context of everything around it.
May this approach be as helpful for you as it has been to me.