How To Avoid Getting Ripped Off At The ATM

I was at the ATM last week, when I saw a technician checking on the machines. He told me he checks all the machines from 6pm to 9pm everyday, looking for anything suspicious.
So I had to ask him: What are some things I should check before dipping my debit card? He showed me exactly what to look out for:

How To Avoid Getting Ripped Off At The ATM : Planet Money : NPR