If your goal is just to get rid of stuff then make the rule that after the sale is over NOTHING that was to be sold goes back in the house.

After our last garage sale we loaded all the leftovers up and took them right to the Salvation Army when the sale was over.

Let you neighbors know when you're having your sale in case they want to have one at the same time. More people usually come if there is more than one sale on a street/in a neighborhood.

If you have kids, let them have a refreshment stand during the sale. Sell pop and bottled water and pre-packaged goodies such as chips and granola bars. I'm a gargae saler and I love it when I can pick up a nice cold bottle of water while out. Plus, kids just such a big kick out of making some money.

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Jesus SAVES by shopping smartly and using double coupons!