I recently watched an amazing Scott Hanselman's presentation. Well they are all amazing in fact.
So he introduced an interesting idea out there. I'm quoting him "There is a limited number of keystrokes left my hands before I die". So the gist of the statement is that it is important to collect your knowledge in terms of blog, knowledge base, whatever format is suitable for you. Just not to waste your time/keystrokes over and over explaining the same information/approach/concept multiple times via skype/email/private chat, just go ahead and send a link to your blog. That's it.
I'm writing this because i just faced similar situation. A collegue of mine asked me to help to setup SendGrid service for Azure and i bloged about this process previously in HOWTO format.