How much content do you need to communicate? A book? A journal? An article? A post? An email? A paragraph? Four, three, or two sentences? 140 characters?
I want you to communicate status about the project every week.
Our relationship needs more communication.
I can't seem to communicate with my kids.
I don't understand what he's trying to say.
Why can't I seem to get my point accross?
Now, again, how much do you need to communicate? That is utterly and completely the wrong question to ask.
Make sure when you are looking for productivity tips, you are optimizing the right behavior!