So here are points of reference for EQ and individual instruments that I thought really help to dial it in. Be mindful, though, that EQ can can't polish a turd. If you have a shitty track and add EQ, all you will get is a shitty track that sounds a little better after you add it.
Here's where I really DIG the digital age. Regardless of what software you are using, you should be able to create a 'custom, as many bands as you need, Equalizer'. A bunch of them, actually.
First, I created EQ's with each instrument I tracked, and assigned them to the track numbers. Then, I edited the EQ and set the number of virtual bands I needed to slide between the specific hertz I read about for the instruments.
Track by track, I went through and adjusted individual EQ for each instrument.
For mixing, I did the same thing. I created an EQ and set bands with the Hz range I listed yesterday for the overall accenting of different bands in the mix.
That's it.
I know, 'that's it' he says

. It may seem a little tedious, because it is. But, you only have to do it once. You should also be able to save these EQ's after you create them, so you can just open them up for any future use. I said, Gawd Damn!!
So, here you go....
Bass Guitar-At 700 or 1KHz. Bottom end is added at 60 or 80Hz. String noise (i.e. dragging the fret hand across strings or anything else that causes unintentional vibration) can be tamed at 2.5 KHz
Bass Drum(s)-Bottom end can be enhanced at 60 or 80KHz and slap is enhanced at 2.5KHz.
Snare Drums-They get fatness at 240KHz. Crispness at 1 to 2.5KHz. Bottom end at 60 or 80KHz.
Hi-Hats and Cymbals-Klang or Gong sound at 200Hz.
Toms-attack is pronounced at 5KHz, fullness at 240Hz.
Floor toms-attack at 5KHz, fullness at 80 or 240.
Electric Guitar-Body at 240Hz, clarity at 2.KHz
Acoustic Guitar-Same as Electric, and bottom end at 80 or 120Hz
Voice-Fullness at 120Hz, boominess at 200 to 240 hz, Prescence at 5KHz.
I'm trying to dig up some reference on this. Some of what I've posted is
note taking I saved, and some of it comes from posts or webpages I've found. Glad to offer to you what someone else offered to me. Pass it on.