Planning an intimate, casual wedding ceremony? Consider inviting guests by phone to keep your invitations simple and cut costs. Phone invitations are virtually free (except for any long-distance fees) and require much less effort than ordering and mailing invitations. A phone call also helps to give your invitation a personal touch, even for guests who live far away, while setting an informal tone for your wedding. This option may be impractical if you're planning an extensive guest list, but you can simplify things by recording your greeting first. If you decide to skip the recordings and make live phone calls, don't expect everyone to RSVP on the spot. Some guests may need some time to process your big news or to check their schedules. Keep it short and sweet, and direct guests to your wedding Web site for further information or to RSVP.