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Here we have a great video tutorial for Adobe Illustrator explaining how to use the Free Transform, Shear, Skew and Reflect tools to create vector logo types and icons in perspectiveImportant shortcuts to remember:
*Mac OS
Cmd + Opt + Shift + Drag with the Free Transform Tool = Shear
Cmd + Shif + Drag with Free Transform Tool = Skew
*Windows
Ctrl + Alt + Shift + Drag with the Free Transform Tool = Shear
Ctrl + Shif + Drag with Free Transform Tool = Skew
More about using the "Free Transform Tool" here.
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