Stephanie,
In a previous exchange I answered a similar question with the following:
(1) sign up to participate
(2) Buy lighthouse postcards (enough for everyone in the exchange plus one for yourself)
(3) Write a note to send with the postcard, but not on the postcard (this exchange is for "clean" cards that have not been written on or postmarked)
(4) Place card and note into an envelope
(5) Create address labels from the list that will be provided to you, or hand address the envelopes
(6) Seal the envelopes, affix postage, place into custody of the USPS
(7) Enjoy the cards you will receive over the course of the exchange, and all the notes that come with them
(8) Sign up for the next exchange, and possibly the "traditional" post card exchange
This was aimed at someone in the "in envelope" exchange. There are also exchanges run for cards mailed without an envelope.
Exchanges form periodically. There are several underway right now. Best thing to do is watch this forum to see when a new one gets started, and then sign up. My exchange is going thru 4/30, and I am planning on setting another one after that. So, stay tuned ...
Dave
