what is the best coding practices for Rails (model View Controller )?

Hi all

please share ur exp

what is the best coding practices for Rails (model View Controller )? Please specify the topic which u want to give like

if you want to give points about Model Than specify it.

Thanks and regards, Shyam ruby on rails developer Mobile : +91(0)86-8846-8400 Web : Shyam.heroku.com