I cannot take any credit for this title, as it is ripped straight out of this great blog article.
The highlights for me: Recycle Erroneously, Cross at red lights with small children, Tell them you don’t like Asparagus – especially the white variety, Explain to them that no one outside Germany has ever heard of “Dinner for One”!
I have experienced German wrath for all of these things more than once. The author got this so very right!
If you have any additional ideas, feel free to comment!