For the last 2 years I've participated in the National Collage Society's annual postcard exhibition. It's an inexpensive way to build your exhibition resume. My collages have been seen in Buffalo, NY and Glen Allan, VA thanks to this annual exhibition of mini-postcard size collages.
(Memories are Forever - 2008)
But this year, I am not sure I will have time to complete an exhibition worthy collage before the May 1 deadline, because work and travel are keeping me extra busy this spring.
If you are a collage artist, I would recommend joining NCS and submitting a work, especially if you live near the Butler Institute of American Art in Youngstown, OH or the Western Colorado Center for the Arts in CO, so you can see your work hanging in a real gallery. Trust me, it's a great self-esteem boost. Good Luck!