These suggestions and most of the text were borrowed from Moonlightline: link

Whenever you send out any snail mail (birthday cards, party invitations, car
insurance payments, utility payments etc etc) simply write a Moonlight
message on the back of the envelope. Just make sure that the message you
write doesn't interfere with the addressee/sender details.

Save Moonlight!
Moonlight-United.com
Renewmoonlight.com

Now take the same idea but update it for your cell phones. Type out your ML
message and store it as a template, then anytime you send a text use the
template and just add in the message you are sending at the time. Obviously
these text messages will most of the time be going to friends/family who
probably already know about your Moonlight addiction, but hey it doesn’t hurt
to keep it on their minds too, does it?  

Same idea again for your e-mail messages to friends/families etc - add your
Moonlight message as a signature to your outgoing e-mails. There will of
course be e-mails that you maybe should not attach Moonlight stuff to, for
example any work stuff as we don’t want any fans getting into trouble at work
do we!

Just a few simple ideas to keep the Moonlight momentum in motion
.