I am building a backbone.js application, and as far as my understanding, each backbone "class" is intended to do the following:
help: funciton(){}
This leaves me uncertain as to where I should place my "generic" code, such as analytics and ad scripts, helper functions, tracking, etc.
What is the appropriate convention for these sort of things? Would I place them into a backbone view (even if they don't contain any page-renderable content)? Do I need to use a module loader like Browserify or Require.js? I would like to avoid getting those involved as the project is small and I don't need additional library overhead.
"What is the appropriate convention for these sort of things?"
Splitting your code in module is a good practice. Use a module pattern or use requirejs to build modules.
Check the module pattern here http://addyosmani.com/resources/essentialjsdesignpatterns/book/