Change you passwords frequently!!
I got a credit due to a refund that I did NOT request on my account. I didn’t use the credit because I thought it was in error. 2 days later, I get an email confirmation of a purchase I made as a gift to someone I have never hears of. I called the company right away. They seemed to have this issue under investigation. It just felt very scary that I was hacked. I feel so dumb. I know the risks, but ignored them for so long. Now I am on guard!!!