One example of an idea for event invitations is to add texture to them. Another idea for a unique embellishment is to use themed postage stamps.
Texture can be added to an invitation with ribbons or by choosing different textures for the card stock and envelope. For a wedding invitation, one way to add texture is to mail the invitation in a small box with a bed of flower petals. An idea for a Christmas party invitation is to fill the envelope with paper snow. Another idea is to print the invitation as a label on something edible such as chocolate bars and large lollipops.