Check with your local homeowners' association for neighborhood garage sale days, or volunteer to coordinate one yourself. Invite your friends and relatives over for an exclusive sale and run it just like a regular yard sale, but without all the public advertising. When planning your sale, stop and think about the ways retailers make their stock appealing to customers. You can borrow those same merchandising methods to help make your stuff more attractive to customers, even in the midst of your cluttered garage. To properly display your own merchandise, you need tables.
Tables bring merchandise right up to where customers can peruse and pick through.
If you can't find tables, or you don't have enough, consider using large cardboard boxes turned upside down, or make your own tables out of sawhorses and planks of wood. Organize your items into groups, and merchandise them that way. For example, if you have a bunch of kids' items, place them all in one area of the garage or yard. If you have a lot of kitchen items, place them together on a table. Tag everything with a price.