Since I am a graphic designer, I find there is so much (self imposed) pressure to create FABULOUS invitations. Well, here's the thing... I went fairly fancy with my STDs (I will post photos later) and I just don't have much energy left. Therefore, I'm going to keep them simple, clean & functional.
I found a company in the States that sells pocket-folder envelopes. They are very helpful and their prices are great. http://www.cardsandpocketsstore.com/
I've quickly mocked up what I plan to do here:
and am posting some inspiration (below) as well.