This guest post is by Michael Stelzner, the founder of Social Media Examiner and author of the new book Launch. Social and selling just don’t mix. Have you ever been to a wedding sponsored by Nike? Does a future where restaurant tables display infomercials sound appealing? The last thing anyone wants in a social context is a commercial. If you’re responsible for marketing your business, the time for change is now. It’s time to pack away the marketing messages. If…