Should I try to use only create, read, update and delete methods in my controllers or is it OK to use more?
I believe the standard is called RESTFul controllers.
I have never understood how this can be 100% possible because there are always scenarios which would involve the addition of other public methods except create, read, update and delete.
Are you building an API? 
You’ll need to build on top of the standard CRUD operations in 99% of applications you build (in which case yes, you will more often than not have to write additional methods for your controllers).
Hi,
Yes I agree, but is that standard practice? Would the best programmers in the world do that?
James.
You may add any actions as you want.
This is the standard.