Human error is inevitable, and that is exactly what hackers count on. One slip-up can result in the loss of large amounts of data and cause a company to lose its credibility in the eyes of its customers. Overspending on high tech systems while neglecting employee training in cyber security is a poor strategy that will prove ineffective. It is also the main reason why human error is a leading cause of cyber attacks. Although it is not possible to completely eliminate human error, seeking ways to minimize it as much as possible will help reduce the occurrences of security breaches. In order to be able to do that, it is important to know the main sources of human error and how to avoid them.