The Leah Day website is pretty good. She has a lot of short "quilt along" videos that can help you get started.
http://www.daystyledesigns.com/
I taught myself how to machine quilt using Harriet Hargrave's book. Here is a link to the newest edition:
http://www.amazon.com/Heirloom-Machi...dp/1571202366/
This older edition is what I used and costs even less:
http://www.amazon.com/Heirloom-Machi...dp/999868871X/
The book provides lots of details and photos that are very helpful. The Leah Day website offers lots of good demo videos. You can also check Youtube for videos of other quilters.