Some cool adobe illustrator tutorials images:
Illustrator Tutorial 2 [Houston Texans logo]

Image by Random Tree
This Illustrator image involved using the pen tool a great deal to select the white background, the blue shape, and the red shape. I then created the star and subtracted it from the blue shape so the white background beneath would show through. I also added a drop shadow to the white background, and grouped the entire thing.
Illustrator Tutorial 1 [Canadian flag]

Image by Random Tree
This Illustrator image was relatively simple to create – I just made a red rectangle with a grey border, added a white rectangle over it with no border, and subtracted a leaf shape from the white rectangle.
Pixel type

Image by Andrew Whitacre
vector.tutsplus.com/tutorials/text-effects/create-a-vibra…