If you are going to shoot weddings, a top 10 wedding photographer has lots of tips and tells you what equipment was used for some of her photos here. since weddings include portraits, you will pick up more than a few good ideas for portraits.
http://www.jasmine-star.com/
She has also given a complete on-line class here: http://www.creativelive.com/courses/jasmine_star
Then, decide which lens you might be missing or need to get shots you can't get now.
We only give you advice that may or may not work for you.
Then, visit these blogs as well.
http://www.crashtaylor.com/
Go to http://www.robgalbraith.com/bins/search.asp and Search on wedding for a whole slew of top wedding photographers and their styles.
You should be able to build a plan for your wedding photgraphy from these, and a plan is needed, you don't want to just do haphazzard shooting.
Then, as others said, a second body. A second photographer with camera is even better. Then your plan can include a much wider varity of images, and if one of you gets sick or delayed, the other can carry on.
I'm assuming that you use the Nikon lens for video, good idea, keep it on its own body .