Great ideas for getting the most profit out of yard sales?

My friend and I are hosting a yard sale and didn't have many customers today. It seems to be just bad timing. We've advertised on Craig's List, plan to post signs at all major corners and as a way to boost profits, have also included a lemonade stand. Does anyone have any other great ideas to increase traffic, sell as much as we can, and/or find other interesting things to turn a profit on?