From TomsGuide

Shop from a secure computer

Shop using a secure connection

Search for deals on retailer sites, not on search engines.

Use trusted vendors

Don’t fall for ‘too-good-to-be-true’ deals

Plan ahead and don’t be rushed

Review credit-card and bank statements regularly during the shopping season

Don’t use debit cards online

Use unique passwords and logon information for every site you visit

If you’re shopping from a tablet or smartphone on Cyber Monday, use a trusted vendor’s app, not a web browser

Never install software on your mobile device from a website link or code