First cut everything to size...
Then glue 294 pieces of Japanese washi to 294 cuts of mat mat board. Be sure to have something to watch or listen to, this takes a while. Also, have some coffee on hand, you're going to need it. :)
Make a dress for your scissors.. no wait, just keep peeling off the little triangles and keep going.
(tick tock tick tock...)
Find many boxes and things to set them in so the glue can dry.