Illustrator

If you are brand new to Illustrator, start here: How To Get Started With Adobe Illustrator CC – 10 Things Beginners Want To Know How To Do

How To Use Adobe Illustrator (Short Videos on Basics)

Adobe Illustrator: Using the mesh tool (Creating an apple)

Adobe Illustrator Tutorial: Compound Paths & Clipping Mask

Illustrator Pen Tool Tutorial – Part 1

Illustrator Pen Tool Tutorial – Part 2

The Bezier Game: Master the Pen Tool!

Adobe Illustrator Tools and Techniques for Logo Design

Illustrator CC CS6 Tutorial – How To Use The Blob Brush

Creating Complex Shape Using Object > Expand and Pathfinder Tools

General Instructions for Grouping and Expanding

Using the Appearance Panel (video)

Shape Builder

Pathfinder (also: Shape Builder and Pathfinder)

Compound Paths and Clipping Masks

Blob Brush

Pattern Maker (good instructions, not-so-lovely pattern…)

Image Trace for photos (all four pages), or Image Trace for artwork.

 

http://design.tutsplus.com/series/guides-to-illustrator-tools–vector-4892

http://design.tutsplus.com/tutorials/illustrators-pen-tool-the-comprehensive-guide–vector-141

http://veerle.duoh.com/design/article/illustrator_eraser_tool

http://pwg.deviantart.com/art/Illustrator-Tutorial-Pen-Tool-8955073

http://school.tatoland.com/illustrator/aipentool.html

http://www.illustratortips.com/index.php/Instruction/Intermediate-Tips/drawing-a-cartoon-face.html