Quickly inspect an ATM before you use it. If the machine looks tampered with or something feels off, it may be best to just find different ATM. If the card reader can be removed, alert the police.
The ATM you choose to use could make all of the difference. Avoid ATMs in poorly lit areas or the ATMs that standalone in tourist areas.
If there is a camera nearby camera attempting to record your PIN, try your best to block it when making a transaction. You could use your hand or your body as a shield. It may also be wise to periodically change your PIN.
It could also be a good idea to use a credit card rather than a debit card. Or, select the option to have your debit card processed as a credit card transaction when making a purchase. This way, you will not be required to enter your PIN and the purchased will be debited from your checking account.
Be cautious if you see someone lingering around an ATM. If someone is there looking from help near one, it could just be a scam.
Keep an eye on your monthly statements to ensure all the money that should be there is. The sooner unfamiliar activity is noticed, the easier it is to fix that problem.
Check your credit report. Places like Equifax, Experian and Transunion offer one free credit report annually.