They all manage to tell what each story is about in a sentence or two. So can you. Make your entire release a maximum of 200 words or less, in 5 short paragraphs. Above the headline or at the bottom of the release, be sure to provide a contact name, phone number, email address and URL for additional information. It's not easy to write tight.
Writing is about re-writing.
Writing well takes time. Start by throwing out the tattered old print press release. Write like you have 10 seconds to make a point. Because online, you do. It is unconscionably rude to assume that mail recipients want to scroll past a long list of names to get to your message.