Here's the recap:<p>Tweet: 100 characters<p>Facebook post: less than 40 characters<p>Google Plus Headline: less than 60 characters<p>A headline: 6 words<p>A blog post: 7 minutes of reading or 1,600 words<p>Email subject line: 28-39 characters<p>Presentation online: 18 minutes<p>A domain name: 8 characters