Firstly: You need to be yourself and enjoy the day! Everyone says the day goes by fast…Believe them! Its one of the fastest days ever! So enjoy ever moment of it, and show it.
Secondly ensure good light, The most important thing for photographers is light! Meaning when choosing the venue/location for getting ready, make sure there is a lot of good light coming into the room. i have found Guest houses and Hotel rooms are normally the best, white walls are a huge favorite.
For reception, please try not to use only candle light, its a great mood, I know, but for photography it can be a nightmare. Try placing some extra light sources such as fairy lights, ambient lighting and so on to give more light…keep in mind…
More light = Better photos