Many analysts think Monday will be the busiest online shopping day of the year. This comes after a weekend of strong holiday sales that topped last year. Retailers are still unsure about how much people will spend before Christmas.

The National Retail Federation says 212 million shoppers came out over the holiday weekend, which was up six percent from last year.

They also bought more as well. The average shopper spent $365 -- that's $20 more than last year.

"The consumer is starting to feel better," said Lori Wachs, founder of Cross Ledge Investments. "They're spending on items such as jewelry and even themselves."

Online spending was up over the weekend by 14 percent. That's good news for retailers hoping to get even more online shopping records Monday.

However, retailers still aren't sure how much people will spend before Christmas. Shoppers, dealing with a high unemployment rate, remain cautious about spending and motivated by deals.

Some shoppers are taking advantage of a new trend -- shopping applications that let them use their phones to read product reviews and check prices in nearby stores.

"We walk around with a mall in our hand," said Steve Yankovich, vice president of eBay Mobile. "I've got prices in my hand. I've got options in my hand as I'm in a particular retailers brick and mortar store and that's different."

Staying online may be the best bet for many shoppers Monday. Retailers are offering big discounts and free shipping to get shoppers logged on and spending.