Writing online

I have alot of experience with writing electronically via facebook, twitter, Microsoft word, excel, and powerpoint. I have been online since I can remember. In school we used to do typing programs such as Mavis Beacon and used our emails often. I used to have about 7 different email accounts and i checked them all. (lol)
In terms of whether my writing style changes, I believe it does. I feel everyones style of writing becomes casual when online. There are tons of new words being used in everyday speech and even text messaging due to people making abreviations and shorter words. I use shorter terms when im on facebook and commas, periods, and grammar are all thrown out the window. The internet does hurt my writing style because sometimes I write how I speak, which seems to be my issue. A good balance of writing online and writing perhaps on a word document could be the best thing to do.