So let's get started.
This is one of my all-time favorite decor ideas from the show: the classic Luke's mug shelf. This could be an easy DIY. Just nail together a couple of two by fours, paint a cute color, and hang on the wall to display mugs or some other collection.
Another iconic piece is the Gilmore mailbox. Very rustic with that small town charm. For this DIY, I would take a regular mailbox, stencil on your last name, then distress it a bit.
This is one of the few elements that you can't DIY, but I love Lorelei's living room. From the built in shelves in the corner to the brick fireplace with that mantle. Very quaint!