Everything you write on the internet is publicly available and connected to you. All your tweets, all your Facebook status updates, all your forum posts from a pseudonym, all your 4chan posts as anonymous, and yes, even your email.

Learn this. Internalize this. Embrace this.

Because even in the few cases where that statement isn't correct, in a short enough amount of time and with a very small number of security mistakes and lapses in judgement, it will be correct.