In your ad state that items will be from more than one family. Many won't bother to go to a small garage sale. Mention any collectible items, books, fabric, appliances, unusual items, tools, antiques. Have some men to provide security against thieves. Good time and place for a group to add some baked goods for sell also. Lots of people will buy a snack while they shop. Keep your house LOCKED while you are outside. Arrange ahead of time for what you will do with what doesn't sell. Start putting prices on items today, it's a never ending job. Good luck.