Do you know what drives me crazy? People who write things like "your stupid" when posting comments on internet forums, youtube, digg, and anywhere else that has a comment box. As a lover of the English language, it pains me to see minor atrocities of this sort on a daily basis. This instructable is not meant as a panacea for the internet's grammatical difficulties, and as such it is by no means comprehensive, but every little bit helps.