The first thing you need to do is place an ad in the news paper for the date, time and location of your garage
Secondly you will need to make large signs to direct traffic to your location. The signs should be on large, brightly colored cardboard or thick paperboard. Use a thick black marker to make large letters and make sure it is easily readible by passerbys. Information on the sign should include an arrow pointing in the direction of your garage sale. Your date, time and street address. Place the signs on all major intersections with your street and keep them going all the way to your home.
Price your items cheap. This is a garage sale for goodness sake. People do not want to pay very much, but you want to sell it, so price it low. Make sure that all items are marked with a price. Use small round removable stickers to price everything. Have everything that you want to sell out, but not things that you do not want to sell. If the weather permits, try to have all of your items outside and close your garage sale so that people cannot see the items you do not wish to sell.
Have plenty of singles on hand to give change. It puts you at a disadvantage if you are not able to give the correct amount of change.