A great option is to add a Digital Save the Date or Engagement Film.  Tell your family and friends to set aside your wedding date with Video Save the Dates.

Save the Date film sessions can be used to remind guests of your date, and to welcome them to your reception.
Caitlin & Jon, a Digital Save the Date

Save the Dates can be shot anywhere, like on the field at Yankee Stadium, for example.

Nicole & Mark, Digital Save the Date
Jean & Dave, Digital Save the Date