With just about two weeks left until Christmas, your business is no doubt in crunch mode. For many, it's the absolute busiest time of the year — and it's going to stay that way.

More and more consumers are waiting to finish (or start) their holiday shopping. Last year, 75 percent of people were still Christmas shopping at this time last year, found America Research Group. And 50 percent were hunting for a great deal and gift up until Christmas Eve. That's the highest percentage of last-minute shoppers the study has seen in more than 12 years.

Your store and website traffic will likely stay busy until Dec. 24. Now all you need is a few last-minute marketing ideas to improve your traffic and sales even more.

Try one, or a few, of the below digital marketing tactics during the last few weeks of holiday shopping.

1. Amplify email marketing

In 2014, email was the primary marketing channel for driving e-commerce sales, found Marketing Land research. Be sure to personalize the email with offers and items in which the shopper has shown an interest. Also, promote unique deals that will stand out from the crowd.

Then, send timely emails, like those reminding customers of cutoff dates for standard, two-day and overnight shipping. Also, be forewarned: Your open and click-through rates will be lower than nonholiday emails, shows IBM data. That's because you're sending more — and so are other businesses.

2. Focus on Facebook and Pinterest

Half of U.S. social media users say what they see on social has some influence on whether they'll buy from the brand during the holidays, shows G/O Digital research. In that survey, Facebook ranked as the number one platform people turn to for holiday shopping inspiration, followed by Pinterest.

During these last few weeks, plan stellar content on these two platforms. Likewise, if you're spending on social media advertising, focus on Facebook and Pinterest for the biggest return.

3. Give gift cards a go

Last-minute shoppers don't have time to search for the perfect gift. Instead, they're interested in gift cards, shows Marketing Land data. Searches for gift cards increase 72 percent the week before Christmas compared to the first week in December.

To capitalize, offer specific gift card deals. And try to offer free, expedited shipping — for many, that could be the deciding factor. Then, promote these deals on social and email the week before Christmas.

4. Host a flash sale

Shoppers cannot resist a deal this holiday season. Half of those who went shopping in stores during Thanksgiving weekend said the deals were too good to pass up, found a National Retail Federation survey.

To boost sales and traffic, offer a deal your shoppers simply cannot resist and promote it everywhere. Last holiday season, 70 percent of people learned of promotions through email, 64 percent from searching online, 56 percent through online ads, and 38 percent from social networks, found an Ipsos and Magnetic survey.