Just found this threat, love it! I'm DIYing as much as possible too!
I've the invitations made and gave email address for rsvp.
I'm making the mass booklets, I had books of decorative paper so I cut sheets to A4 size and they'll be folded in half with simple printed pages. Ive a long-arm stapler so I'll staple them in the centre like a copybook.
Im in the middle of painting signs with love quotes that I'll put around the reception room.
I made a little strip of bunting and embroidered "just married" for the cake topper; tied it to two little wooden skewers that will stick into the cake.
There are some lovely ideas here, I must give some of them a go!