Wedding invitation may be a part of the service offered by the wedding supply company. They may be able to address, stuff and mail the invitations without the bride or groom having to take on this extra task. There is usually a fee for this service but it may be cost and time saving in the long run.
For those maid of honors and best men that have to plan the bachelor and bachelorette parties a wedding supply company can also provide all the decorations, food items and table settings needed for those parties as well. Consider using the same company as for the wedding party to compliment the themes and supplies.