NRW FTW

When to use the different der/des/den/dem/die/das are really hard to understand. I mostly just guess or say it a bit mumbling so I just say 'de', I even made a sentence once in which my girlfriend was masculine... In Dutch (only 2) and English (only 1 'the') it's easier

Some very handy stuff:
Wie bitte? = a sign that you didn't understand what the person said, they'll repeat it again if you say this.
Sprechen Sie Englisch/Sprechst du Englisch? = do you (polite) speak English/do you (informal) speak English? Most young people wouldn't mind if you say 'du' but just to be safe say 'Sie'
Wo sind hier die Toilette? = Where are the toilets here?
Ich lös mein Zauberwürfel ganz schnell! = I solve my Rubik's cube very fast
Alter! = Dude!
Verdammt! = Damned!
Ich hab kein Duden dabei, den brauch ich nicht = I don't have a dictionary, I don't need it.
Halts maul, pack dein Rucksack und geh mit nach Schwimmbad! = shut up, pack your bag and go with me/us to the swimming pool!
Ein großes Bier bitte! = a large beer please (y
ou don't need to know the small or medium ones 
)
Egal = it doesn't matter/ whatever