Postcards are cheaper

Use postcards for your Save The Date, and RSVP. Not only will you save money on postage, but on the RSVP as well (the price of the extra envelope adds up).

Look online

There are lots of places online that sell wholesale or discount wedding invitations.

Make things easier

Not everyone has great handwriting, so make sure you number your invitations. By numbering your invitations you can easily figure out who replied and who is coming.