manners on the internet..
examples:
*Not using CAPS unless you are trying to show that you are angry.
*Not sending abbreviations (i.e. LOL, BTW, TTYL, GTG, OMG etc.) to people that won't understand it.
*Not tagging people in photos on networking sites without permission.
*Not posting inapropriate status' about others on networking site.
*compressing photos when sending them to people so you don't block up their computer system.
**many more**