Under no circumstances provide anyone with your card PIN, especially over the phone. Only provide personal information when you are sure you know who you are talking to and there is good reason to provide it.
You should treat your card like it is cash and make sure you never lose sight of it. If possible follow a waiter back to the payment terminal in a restaurant. This may look awkward and silly, but it's essential to prevent your card being cloned and misused.
Shred old receipts and credit card bills. And be sure they are completely destroyed.
Check your card statements regularly. Always report unauthorized or suspicious transactions to your financial institution immediately.
Use your hand or body to shield your passcode when you are conducting transactions at an automated teller machine (ATM) or at a point-of-sale terminal.
If your debit card is lost, stolen or retained by an ATM, notify your financial institution immediately.