As you look at your schedule for the day ahead, it's always wise to anticipate the appropriate attire. Perhaps you are meeting a prospective client; a suit and tie may be in order. Manual labor type day? Jeans and a t-shirt. Is an important meeting approaching? Chainmail may be the wisest choice.
Just as you consider an appropriate outfit for the day, prepare yourself emotionally to handle what you know is coming. There may be some difficult decisions ahead, be mentally ready for that stress. Maybe your team needs encouragement, be ready to give it. Prepare for what you know, so you will have the bandwidth to handle the unknown when it comes.