Before you write your toast, you should have a good idea of who is going to be attending the wedding. If it's a destination wedding with only close friends and family, you can afford to be a little more personal. But if the guest list tops 400, keep in mind that lots of inside jokes and stories may not go over too well at a really large wedding. It also helps to know if you need to be aware of any sensitivities with extended family. The last thing you want to do is inadvertently offend the groom's Great Aunt Myrtle.