It may be easier said than done but you need to avoid stress at all costs on your wedding. You cannot control everything. So it is better to let things take its own course. The best you can do is to pre plan as much as possible. Make sure that you have started planning for your wedding at least three to four months before hand. You must jot down every small detail in pen and paper. Make sure you have a checklist ready and you tick off the items that you complete.
Choose your vendors wisely and have all the agreement in writing. Brief them about what you want before hand. Avoid making any last minute changes. You can even call up the vendors a week before your wedding to make sure that everything is fine. Keep reliable attendants to take care of the arrangements at your wedding. Divide the tasks before hand and give them a checklist they can follow. This way, you will not have to bother about the intricate details. Do not skip food on your wedding day. That is the biggest mistake you can commit. Empty stomach stresses you more. Above all stay happy as that is something that should come naturally to you on that day.