UNDATED (WUSA) -- Seventy-two million Americans plan to do a little online shopping while they're at work Monday. Here are some tips:

• Use a secure website. The URL should say "https."
• Pay with a credit card instead of your debit card.
• Don't use public wifi if you're shopping on your smartphone or tablet.
• Make sure your device is password protected.
  
  One perk of Cyber Monday shopping? Many sites offer free shipping!