I guess because I am always striving to be organized, I like to create things that help to create organization (of course, I sell them all and then don't ever get myself organized--oh well!). I do find organizational items are great sellers. I guess like me, others are also looking to "get it together".
Here are a couple of bulletin boards I made. I buy cheesy old pictures for the frames, repaint them and then add fabric covered bulletin board cork. I pick up used bulletin boards at garage sales, usually for a buck a piece. It doesn't matter how bad they look, because they get covered. I usually add a thin layer of batting between the cork and the fabric. I staple the fabric onto the back with a staple gun. I then use the ribbon to add a grid design. I usually, much to my husband's dismay (he is a math teacher and enjoys precision!), eyeball the ribbon. I staple it on and staple where the pieces cross. And then hot glue a button over the staple. I glue some buttons to tacks too so they coordinate.
Here is a mail sorter or storer that I made from an old metal lunch pail. I added red and white polk-a-dotted round ball feet to this one, but took the picture before that. Unfortunately, I don't find too many of these lunch boxes. Keep your eyes open for junk that may help you become more organized.