For Weddings, I usually bring at least one other photographer to help cover the entire day with me so no detail or moment is missed! If you are having a larger wedding where bride and groom are getting ready at different locations, I might have my other photographer cover the grooms/groomsmen getting ready, and/or assistants to help as well. I will always stick to the brides side and I always ensure that I am well-staffed to make sure that your wedding is captured impeccably and that nothing is missed.
For Portrait Sessions, I normally bring my wife (Melody) to assist me when shooting portraits. Melody is my official light and reflector girl.