Shoppers love Costco not only for their items but also for the free samples. Costco puts out the most free samples on the days it sees the most customers: Saturdays and Sundays.

According to a Redditor who used to pass out Costco samples, the best time to get samples is during the early afternoon when the shifts change and the store gets a bit less busy.

The same Costco Redditor says "If you want unlimited amounts of samples and no lines go on a Monday or Tuesday," but be aware that your options may be limited.

Another option — if you're looking for sheer sample variety — is to visit Costco just before a food-centric event, like a major sports game or a holiday like Thanksgiving.