Always consider: BUDGET
The vendors and venue are important as they will represent you as a professional. The least expensive person is not always the best individual. Take time to review and consider the cost.
How important is it to RSVP? Okay, what does it mean?
The RSVP should be returned as soon as possible and returned with either a yes or unable to attend. If the card has a specific name, it is impolite to add additional family members or friends to the guest list.
Planning is especially important and in some situations a year ahead is fine if booking a venue during high party months.