Good resources for white belts:
Stephan Kesting's A Roadmap for Brazilian Jiu-Jitsu
Nick “Chewy” Albin's Focused Jiujitsu
Christian Gruagart's The Brazilian Jiu Jitsu Globe Trotter
Bruce Hoyer's Mindset for Learning Brazilian Jiu-Jitsu
Stephan Kesting's 16 Most Important Techniques for the BJJ Beginner
John B. Will's 36 Core Techniques
Matt Serra's four-volume BJJ Basics
Roy Dean's Blue Belt Requirements Sample Clips
Stephan Kesting's How to Beat the Bigger, Stronger Opponent Sample Clips
Christian Gruagart's Super Fundamental Principles / White Belt Survival Course
Nick “Chewy” Albin's White Belt Tips
Inverted Gear's White Belt Questions, Black Belt Answers
For Pay Books
Saulo Ribeiro's Jiu-Jitsu University
Renzo Gracie and John Danaher's Mastering Jujitsu
Kid Peligro's The Essential Guard
Neil Melanson's Mastering Triangle Chokes
For Pay Videos
Jason Scully's Grapplers Guide, my review here, another review
Rener and Ryron Gracie's Gracie Combatives
If you are being smashed, you done fucked up a long time ago. Best defense is to never get there. But if someone is smashing you, and not trying to advance the position, there really isn't much you can do until he decides to go for something.
I would suggest getting Jiu Jitsu University and start going over the survival portion of the book.
Jiu-Jitsu University by Saulo Ribeiro
Almost a must read for any new student imo. The focus on positional postures and whys is especially under taught imo.
Also you can take it to the mats and look at it while drilling. Also it's cheap.
(But for dvd series Saulo's early series and Demian Maia's Science of JiuJitsu are both amazing.)
Pick up a book called BJJ university. Its fantastic and will give you all the essentials you need to survive on the ground.