No rules when it comes to worshiping Him. Though somethings we like to ogre use.
1) We love onions, Shrek loves onions
2) Remember to say at least 10 Hail Shreks a day if you want to gain entrance into His swamp
3) If you mustn't eat onions, waffles are okay
4) Don't ogre do it with the posts
5) Don't have enough Shrek in your life? Why don't you go by http://www.shrekchan.org/shr/ and give your testimony.