Cake cutting, a reception tradition based on symbolizing the new couple's commitment to taking care of each other, is often stressful for the bride and groom, but it needn't be. Often couples are nervous about how to actually best cut the cake, but your baker or wedding planner can help you with this. They have had lots of experience and will show you exactly what to do.
Also, have a game plan ahead of time. Unless you are a couple that everyone expects to shove cake in each other's faces, be nice. A face full of buttercream ruins what was probably an impeccable and expensive makeup job.
If you're looking for suggestions for cake cutting songs, start here.