This is a pretty simple and proven marketing tip. Some of you guys may already know about it and for some of you guys, this will be the first time. The idea is simple! When you do a sale or a promotion you need to add a countdown timer to your website/webpage. Having a countdown timer makes people act now. So here is an example.
If you have a deadline or a sale for holiday cards, promote as normal. But create an unique webpage for that promotion. At the top of the webpage put a large countdown timer letting everyone know when the sale/promotion or deadline ends. We just use a free countdown timer plugin in wordpress.
Do a little research and add this little tip to your next marketing campaign.
Hope it helps