If you want someone to do something for you, especially if you're asking it as a favour, ESPECIALLY if it's from someone that you either don't know well, or at all, BE POLITE! Being rude, arrogant, unprofessional, disorganised and just plain difficult is NOT the way to get other people to help you.
I had an email from someone asking me to do some research for them (I used to work in research, many years ago), and the person who originally asked me was really nice and polite and said that I should email the project leader to let her know that I was available. I sent said project leader an email saying that I was interested, with the times and dates I was available. The email I got in response, from someone I have never met/spoken to in my life, was this:
"phone number plse.What is wrong with this? No salutation, just a misspelt demand. I wouldn't even send a friend I've know for years an email like that. There is such a thing as etiquette, and this just stomps all over it.
Thanks
Doreen."
Not to mention, my phone number is in my email signature, right underneath my name. AND I know for a fact they have it in file - the person I originally dealt with said that she had my number and email on file so they could contact me for future work.
Needless to say, I will NOT being doing this person any favours.