In my opion, the best practice to learn about the tips and tricks in Adobe Illustrator is to learn through how-to tips ans tricks tutorials.
In this post, Some of the most amazing Illustrator tutorials and vector art tutorials that will help you get idea about how to use each of the Illustrator tools and features. There are also another amazing collections of Illustrator tutorials here:
- Ten Vector Tutorials that Every Designer Needs
- Amazing Vector Tutorials Collection
- 10 Most Wanted Vector Tutorials
- 12 Amazing Vector Tutorials
This Illustrator tutorial will teach you how to covert bitmap photo to vector and apply this amazing effect on it.