These tutorials explain some techniques I'm using in my work.
This page is a work in progress, it will be updated in time.

How to Blend Objects Into a New Background
Kick Your Photos Up A Notch
Moon Flight: Create a Ghostly Effect in Photoshop
Portrait Retouching for Beginners
Post-Processing Tricks: Vintage Effects
Speed Up Your Photoshop Workflow
The Ghost Car: cutting and blending techniques
The Making of "Gift for Tomorrow"
Transform a Sunny Image into a Rainy Grungy Illustration
Turn a Portrait into a Beautiful Porcelain Mask
What Not To Do in Photoshop

 

You can redistribute these tutorials as long as credit is given and link back to the original page where the tutorial is posted.