Overview
It seems that you were not fully aware of all the responsibilities that one of your newer partnerships would entail. This fact might hit you all too hard today when a deadline gets pushed up. See what you can do to negotiate a little bit of wiggle room in your busy schedule, and don't take on too much extra work. You shouldn't promise to do something you know you can't do. Use facts and figures to make your point. Asking questions will help you avoid making the same mistake next time.