A detailed generalized timeline that everyone can relate to
Having a detailed timeline of your wedding day so all parties involved can look at is very important. Some previous brides of mine created a timeline with addresses, phone numbers, times when the florist was coming to set up, when the photographer would arrive, when the last shuttle was coming to pick up the wedding guests etc. Having a timeline with ALL times and ALL vendor involvement ensures everyone knows what everyone is doing.
First Aid Kit also known as a survival kit for wedding days
Having things such as bandaids , a sewing kit with thread thats white and also a thread color that matches the bridesmaids dresses and grooms attire is important. Other things to include are umbrellas, deodorant, hairspray, tylenol for headaches and snacks so you don’t get hungry.
Location permits
If you are having your wedding photographs taken at a location that needs a permit make sure you have a hard copy on file so if you have to show it to an employee at the property you won't have any issues.
For the groom and groomsmen
I highly suggest bringing another dress shirt on the wedding day. If it is summer weather you may sweat a lot resulting in your dress shirt showing perspiration. I suggest freshening up and changing before the reception starts so you know you’re good for the rest of the night.
Hire a wedding planner for either day of planning or full planning.
A wedding planner knows the ins and outs of a wedding and knows exactly what to do if something goes wrong.