An academic's occupational hazards include having to wade through a lot of unsolicited e-mails from people one doesn't know; in my case, quite a big chunk of these mails is from undergraduate students seeking summer internships. I find most of them are poorly written (I wouldn't blame them; as an undergrad, I was quite pathetic too in this department), and I have seen so many of them in a strange language which, I later learned, is called SMS/Orkut.
I have often wished they had access to advice on how to communicate with others (i.e., how to make a 'cold call') in a professional way -- particularly when they seek some help/favour from the person they are writing to. Please don't get me wrong here; I'm not arguing here for letters in stilted prose that start with 'respected sir' and end with 'your obedient servant' (though I do like obedient servants who are respectful to their masters). I will be happy with something that's even 10 % compliant with Eszter Hargittai's advice.
You might want to read a counterexample that violates so many of Hargittai's rules.