Still learning the framework and I am unsure as to then one should use Crud & Model Generator (protect/controllers, protect/models, protect/view) as oppose to when one should use Module Generator (protect/modules/…).
Is there some sort of guideline or recommendation that says use Crud & Model Generator when doing this and use Module Generator when doing that? Anyone with some useful tips?
you should create a module just whenever you really mean to create a module.
a module should be a stand alone application that you may want to use in many others.
a blog can be a nice example of it.
a blog is made of many views, controllers and models that you may want to use in many websites, so it should be a module.
Follow nickcv and read the guide: http://www.yiiframework.com/doc/guide/
The "Fundamentals" section will get you started. Then you will know when to use modules – and thus generate them.
Bonus: check giix out 