From BlenderWiki

Review notes to do  sort tutorials, group by experience level

Tutorials

• Cycles Complete Overview
• Cycles Basics Tutorial Series

• Introduction to Cycles (Blender Guru)

• Introduction to the Cycles Render Engine (Blender Cookie)

• Volumetric Absorption in Cycles

• Advanced Particle Trail with Cycles

• An Animated Pin Toy (BlenderDiplom)

• How to create hoar frost in Cycles (BlenderDiplom)

• Create a Realistic Water Simulation (Blender Guru)

• Advanced Organic Material Setup with Maps (BlenderDiplom)

• Rendering a Scene of Wooden Barrels (Blender Cookie)

• Rendering Nuts and Bolts with Cycles (Free 3D Tutorials)