This goes for people's names too. Most people are incredibly busy and want to read one page or less. Most people are not good readers. People have their own ideas about almost everything. They filter your words and ideas through their preconceptions and agendas.
Most people like to read common newspapers.
After you write something, read it out loud. If you stumble while reading, so will your readers. When you read your writing out loud, note where you feel comfortable pausing. If you don't use commas to help yourself know where to pause, readers won't know where to pause either. Of course, if you are a poor reader, that's another story.