Summary of Ruby on Rails fundamental concepts

Being new to Rails, I am having a difficult time finding a website or reference that gives a run down summary of Ruby on Rails. I understand MVC, ActiveRecord, and that sort of stuff on a basic level, but I am having a hard time understanding some of the relationships and fundamentals. For instance:

1. What are all naming conventions I need to be aware of?
2. How should controller actions be structured and named?
3. What are the best ways to render information in a view (via :content_for or render a partial) and what are ways I shouldn't use?
4. What should go into a helper and what shouldn't?
5. What are common pitfalls or something I need to do correctly from the very beginning?
6. How can you modularize code? Is that what the lib folder is for?

I have read a number of responses on StackOverflow in regards to this question, but all of them just point to a 300+ page book I need to read, whereas I just want a concise summary of what's important.

Some resources I am already aware of, but do not offer a concise summary of fundamental concepts for new users:

• http://railscasts.com/ (good, but fragmented)
• http://guides.rubyonrails.org/ (assumes you already understand relationships between everything)
• http://ruby.railstutorial.org/ (paint by colors, no good summary)
• Rails AntiPatterns (great, but you have to read the whole thing before you understand anything)
• The Rails 3 Way (great, but again, you have to read th