Here's a list of the best music mixing technique articles written by John Rogers of JR Mastering.  I used to work with John in the early 2000's.  Enjoy!

Music Mixing Tips
Tips to make your mixes stand out!

How To Prepare Tracks For Mixing
All you need to know!

How To Create Headroom For Mastering
Details on how to create proper headroom in your mixes.

Setting Mixing Levels For Each Instrument
What are the settings for each instrument.

How To Set Mixing Levels Before Mastering
Here's all you need to know.

Should You Mix Sound Like A Mastered Song?
Or should you leave it to the mastering engineer?

How To Mix Your Tracks
Miscellenous articles to help mix your songs.