I just found this helpful tutorial from The Whipping Post

And here is a basic overview of the tips:
1: Use MONO Sound Sources
2: Rest your ears
3: Keep the bass and kick panned dead center
4: Use EQ to cut, not boost
5: Fix frequency masking problems
6: EQ boosting also boosts your volume — keep this in mind when setting relative levels
7: Subtle effects are most effective — contrast is key
8: Use noise gates strategically, and before reverb
9: Cut off unnecessary frequencies, especially low rumble below 30-40hz
10: Avoid mixing with headphones

I found a helpful article that will teach you some fundamentals about audio. If you have ever wondered what a sound wave actually is, or what’s behind all the complex audio terminology, take a few moments to read this article and fill yourself in on the background knowledge that will give you the upper hand as a producer.

Here’s what’s covered in the article:

* what sound is caused by
* what a sound wave is
* what a cycle is
* what frequency is
* what a hertz is
* what a pure tone is
(more…)