[EASY] Best practice for this (MVC)

[eluser]NeoGeneration[/eluser]
Hello there,

I have some functions that connect to a model and to a library. These functions were initially in a controller but now I'm using the same logic in another controller.

I was wondering whats the best practice here to get the code tidy.

I tried to convert my functions to a library or helper but I got lost and I don't know if that is what I should do.

Thanks for that.