How often should you post? How long should your posts be? Many factors play into those answers but I like Content Blog’s Amrit Hallan’s treatment of the subject.
“These days it is advised — rightly so — that you should write less, write well, and promote a lot.”
Write less. A good rule of thumb. Being one [...]

Don’t SpamCareful what you send out via email.  If someone hasn’t opted-in, then they’re going to be upset if you send them an email they don’t want.
Certainly, don’t send it more than once a week.  Constant emails, even if opted-in, are considered spam to your customers.  Consider RSS Communication if you need to send out [...]