A friend told me that when exchanging casual emails with a stranger, she will give bonus points to someone who constantly changes the email subject header. She said this shows they put thought into their emails, even the subject headers. Hmm. My jc girlfriend and I have a habit of putting the day of the week as our email subject header, followed by an exclamation mark (eg. Mon! Tues!). We relished counting down to Friday, which is represented by TGIF! instead of Fri!.