Some great illustrator tutorials:
1. zombie: http://design.tutsplus.com/…/how-to-create-a-stinking-zombi…
2. yeti: http://blog.spoongraphics.co.uk/…/how-to-create-a-cool-vect…
3. videogame char: http://design.tutsplus.com/…/how-to-design-and-vector-a-set…
4. vintage sign: http://medialoot.com/…/quick-tip-how-to-make-retro-text-wi…/
5. vector landscape: http://blog.spoongraphics.co.uk/…/how-to-create-a-simple-la…
6. vintage sign: http://wegraphics.net/…/creating-a-vintage-typography-layo…/
7. vintage badge: http://www.vectorgraphit.com/create-a-badge-using-free-res…/
8. rainbow background: http://design.tutsplus.com/…/quick-tip-create-a-shiny-abstr…
9. mobile icon: http://blog.spoongraphics.co.uk/…/create-a-vector-rss-icon-…
10. icon: http://www.vectorgraphit.com/create-a-flat-icon-with-long-…/
11. beer black and white illustration: https://www.youtube.com/watch?v=EADDEIN6QRw
