It may seem trivial now, but consumers who forget to plan their meals in advance could be risking lost savings on account of a grumbling stomach. To avoid distractions like hunger, Wilson recommends shoppers pack food to sustain their energy while in line and in between holiday shopping trips. "For that matter, shoppers should also use the restroom before leaving home, so there are no issues while waiting in line," says Wilson.

Shoppers who keep their eye on the prize and prepare ahead are the ones that tally up the most savings at the end of the day.