New Creative Cloud Tutorials – understanding Adobe Illustrator CC
Sketch to Vector Tutorial
http://blog.seanmartell.com/2013/02/14/illustration-techniques-sketch-to-vector/
PSD TUTS! Excellent online tutorials to develop your skill levels.
http://psd.tutsplus.com/category/tutorials/illustration/?commented=true
(36 mins long!)
Turning Linework into a Vector
http://www.smashingmagazine.com/2010/11/15/illustrator-s-live-trace-sketch-to-vector/
Creating Vectors using Illustrator
Best of 2012 Illustrator tutorials
http://www.digitalartsonline.co.uk/features/illustration/best-of-2012-illustrator-tutorials/
Vector Lines with Watercolour effects
Vector Tuts General stuff
http://vector.tutsplus.com/category/tutorials/illustration/?recent=true
Beginners? Here are a few sites for you.
http://blog.spoongraphics.co.uk/articles/20-basic-illustrator-tutorials-every-beginner-should-see
http://mashable.com/2010/08/19/adobe-illustrator-tutorials/
Creating an Obama Hope campaign-like poster
http://vector.tutsplus.com/tutorials/illustration/create-an-inspirational-vector-political-poster/
Finding the pathfinder tool tricky? Go here:
http://vector.tutsplus.com/tutorials/tools-tips/a-comprehensive-guide-to-the-pathfinder-panel/
Colouring & Inking Tutorial
PHOTOSHOP TUTORIALS
Digitally colour your hand drawn illustrations!
Create a Vector style illustration using Photoshop
http://psd.tutsplus.com/tutorials/drawing/create-a-vector-style-illustration-in-photoshop/ (this is also featured in one of the links below)
How to develop a handmade illustration with Photoshop
http://designinstruct.com/drawing-illustration/develop-illustration-photoshop/
30 Beautiful Photoshop Tutorials
http://sixrevisions.com/graphics-design/30-beautiful-photoshop-illustration-tutorials/
Photoshop Brushes