One of my favorite tools
One of my favorite tools for PR, and one of the smartest tools you can use, is the AP News Calendar. Major scheduled events during the week. In other words, AP will be covering these events and news. You can plan around it or plan with it, or plan to avoid reaching out about your news, or news from your client, because of what's on the calendar.
If you are in the media relations business, you better be up on the events of the week ahead, in addition to following news of the day and breaking news.