What Do You Do to Make an Open House Successful?

I’ve been thinking a lot about open houses lately.  I’ve had some over the years that have been wildly successful and others that have been less than spectacular.

So, I thought I’d throw it out in the Rain . . .

What have you done that you have found to have the best results?

Is it online exposure?  Newspaper advertising?  Free food?  Clowns for the kids?  Signs?  Balloons?

Throw it out there!  Let’s all learn from each other.