I religiously use emails everyday. Some of the emails are really hard for me to reply. So I decide to make a chart below and I will put this on my homepage after adding more instructions.
One more thing: Please do not write to my co-authors of the same paper separately. This will make each of them spend 15 minutes to reply the same set of questions. Put them all together in ``To'' field.
And, please read ``How to ask questions The smart way'' before emailing me. http://catb.org/esr/faqs/smart-questions.html
This chart is made out of Open Source software only.