Many of you have probably already seen this, but Varien did a series of tutorials for everything from mixing to composition on youtube, as well as some break down of his tracks. All of the ones I've watched have been really clear, and I've definitely picked up some new techniques to use in my stuff. Links are below.
Enjoy!
Composition / Theory
Names of the Notes
Basic Scales
Intervals
Chords
Chord Progressions
Note Lengths
Basic Song Structure
Melody Writing 101
Let's Break Down...
Morphine
Lilith
Random Tutorials
Basic Drum Mixing + Free Sample Pack
FL Studio Basics + Massive Presets
Basics of Sidechaining