Complimentary close for informal email/note/txt

Hello,

I read the thread "When to use 'Yours Faithfully, Sincerely or Thanks'".
But what I'd really like to know are a few very informal - though often used - complimentary closings for short email, notes or txts.
I am a bit confused, since there are many complimentary closes used here in Switzerland among young people, but I am not sure if it's 'correct' english.
In order that you know what I am talking about, here are a few of my examples: 'greetings', 'greetz', 'yrs', 'see you', 'C ya', 'later', and stuff.
Can anyone give me a selection what might be used in english-speaking countries?

thanks in advance