1) Journalistic style - everything what is going on, not posed, but natural, but you still can give them some directions. First I would ask the couple if they have a wedding timeline (all important events, which will be happening, place and time), so you are ready to capture them. It doesn't mean everything will go 100% by the plan, but you will be prepared and kind of know how much time you have. It is a good idea to see the place beforehand to get an idea about the space and the light and take some test shoots, especially if you don't have much experience. Try to take a wide shoot and close ups of everything what happening, don't forget to move around and try different angle.

2) Formal photos with a family. Ask them if they want to take formal photos with family members, when, where and with who. This is really my least favorite and boring part and you might run in too a few challenging with some kids, who would not want to cooperate, one person in the group who is blinking, etc. Head replacement in Photoshoot is the saving grace while photographing large groups, especial if you are limited on time. 

3) Details of the wedding. People spend a lot of money on details of the wedding, so make sure you get those as well (like food, flowers, cake, etc.). If possible, try to be at the venue before anyone else to photograph those. 

4) Some posed images of bride and groom and maybe bridal party. Ask when they want to do those, if there is any nice place near by or even at the venue. Usually sunset is a good time for those photos. If you never shoot those before, create an inspiration board of poses on Pinterest, maybe practice beforehand to pose somebody that way, or if you get totally stuck, you can even show bride and groom an inspiration picture on your phone, so they get an idea.

I hope this helps. Usually good planing makes things so much easier. 

There is some suggestion related to the wedding photography is Close-up of the bride just before she makes her entrance, Bride and groom at the altar, Altar or canopy from the back during the ceremony, a Wide shot of audience during the ceremony, from bride and groom's point of view and much more.