Get free coverage for your sale, by contacting local newspapers, radio and TV stations. I send a brief email explaining about store going out of business, time in business, the time frame of liquidation and contact name and phone number. You do not get 100% success rate, but many of my clients have received free exposure from multiple sources with huge results. If you do an interview, do not mention the discount % unless 33% or more.
If no response, follow up with an email. I like to send the emails a few days before the sale starts. I look for a specific person to send the email, but if I do not see one use the general email address.