My most favorite thing to DIY, however, has got to be party paper! This has become more and more commonplace over the years with the fabulous options at Target and Micheal's and with printers having come so far. Still , I know many people who outsource invitations, place cards, menu cards, and signage.
I have been doing my own since 2006 thanks to a simple and fabulous program called Printing Press Extreme. I can't say enough about this program, which you can purchase in its updated form here. I also love to use the software that was free with my silhouette to do these types of projects. It makes it so easy to elevate even a small event like a shower or birthady party.
The table assignments directed guests to tables named after her beloved grandkids (fortunately, there were exactly 6 tables). You can see that the table number was also in the same "suite" as the invitations and signage:
To carry the theme even further, I added a menu card to match: