I've tackled the shot list before, and now that our wedding is long over, I have some other ideas on the shot list. For those who think that of course the photographer will take a picture of the bride with the bouquet, etc., I will remind you that we forgot/ran out of time to do any real "portraits" before the wedding and forgot during the actual picture time as well.
One of the comments I got on this post was to make sure I got a shot with my readers, since my friend Amanda didn't. I read that and thought, "we don't have a reader," so I didn't think any more about it. We didn't have a reader, but we did have two ceremony musicians who I forgot to get a shot with until the very end of the night. We also had a few people who I would have loved to get pictures with, like my cousin's wife who helped us get ready and was so busy running around and throwing us a wedding that we didn't get a chance to get a picture.
These things you may not be able to get in a shot list; but day-of, don't assume you'll get a shot with the person you are talking to later - grab your photographer (or somebody else with a camera - there will be about 100 of them) then and there and ask them to take a picture. Make a list of the most important shots, that you'll be sad if you don't have - details, family photo lineups, and the more stylistic things, like getting shots of people dancing, etc., or to take pictures of the guests and not only of you and your new spouse. Also, it is very very important to realize that your photographer is only one or two people, they will not capture absolutely everything, and if you want a casual, photojournalist style, you won't necessarily get pictures of everything. (But oh man, the pictures you get will be amazing and they will make your heart sing and all you have to do on a crummy day is just look at them and feel better.)