Reddit mentions of Unity Game Development Essentials

Unity Game Development Essentials - I got started with this book, I found it pretty fun to work through. It's mostly a single 'game' you keep adding features to, if that's not your style then the book mrBobBobJack recommended looks good too.

Tornado Twins Youtube Vids - Found some of these helpful.

If you're just getting started you probably want to start with JavaScript, as most tutorials use it. You can switch to C# when you feel comfortable, it's not much different to use in Unity.

To help figure things out make liberal use of unityAnswers and the really good Unity Documentation.
Here's a nice page on performance optimization, here's the video version.

If you have any more questions feel free to pm me or whatever and I'll answer to the best of my knowledge.

Check out these links...

http://learnunity3d.com/

http://activeden.net/category/unity-3d

And maybe purchase these books...

http://www.amazon.com/Unity-Game-Development-Essentials-Goldstone/dp/184719818X

http://www.amazon.com/Unity-Development-Example-Beginners-Guide/dp/1849690545/ref=pd_bxgy_b_text_b

http://www.amazon.com/Game-Development-Unity-Michelle-Menard/dp/1435456580/ref=pd_bxgy_b_text_c

Picked this one up:
http://www.amazon.ca/Unity-Game-Development-Essentials-Goldstone/dp/184719818X/ref=pd_sim_b_2

learned the basics of unity scripting and structure in less than a week. Switched to self-learning from there (advanced C#)