Are there any proven methods for improving working memory? I forget so much of what I hear day to day, and think I could be far more effective in most regards

Are there any proven methods for improving working memory? I forget so much of what I hear day to day, and think I could be far more effective in most regards if I could remember (something from the news, what a certain client said about X, or name of the cool company I read about etc.). I've read several books about memory techniques, and can use the techniques actively to remember a number or a list. That is cool, however I really want to improve my working memory without needing to actively try to remember everything.