Learn: Making Different Amigurumi Shapes

If you're looking for a book to get you started on amigurumi, you can't go wrong with June Gilbank's The Complete Idiot's Guide to Amigurumi. The author of PlanetJune website/blog definitely knows what she's talking about, providing some of the clearest explanations out there for beginners. I still refer to various instructions on her blog when I am working on my amigurumi.
This online sampler of the book will give you info on how to create triangles, cones, ovals, cylinders, circles, spheres, tubes and flat oval.  Go to link