I jus practiced over the years. You develop a ear for that other people can't use. Use the EQ to carve frequencies out. Don't use it to boost certain frequencies. If you listen and take your time for long enough, you'll be able to achieve a quality mix.
I just attempted to mix,eq and master a quick song I made just then.
Reckon you could judge it for me and see how I went?
here's a good resource : https://www.youtube.com/user/pointblankonlineIn ableton live , you can learn with some tuto's in youtube.
As mentioned, you need to put in a shit ton of hours.
There's really no short cut, but having the right tools, a mentor and/or attending pro sessions
can help accelerate the process.
It's like asking how to learn to play an instrument really good. .. put in the time 24/7/365. gl