Always make sure you have an extra cushion of cash and your checkbook handy the day of the wedding. Emergencies can always pop up and it's better to be prepared with extra cash in case something happens. You may want to invest in a wedding-day emergency kit, which includes sewing basics; common ailment medications (like sinus medication, ibuprofen, and antibiotic ointment); candy and energy bars; and anything else that you feel will help you and others feel more comfortable and prepared the day of the wedding.