As a new user of Docker, it's essential to be aware of common mistakes and take steps to avoid them. One of the most critical errors is using `docker container ls` instead of `docker ps` to list running containers, which can lead to confusion and inefficiency. Another mistake is creating containers with incorrect configurations, which can result in wasted time and resources. It's also crucial to assign a name to your container to make it easier to identify and manage. Additionally, new users should be aware that containers are not automatically DNS-resolvable and take steps to ensure they are connected to each other. Finally, users should be mindful of file system sharing issues and take measures to resolve them. By following these tips and being aware of the common mistakes made by new Docker users, you can set yourself up for success and navigate the learning curve with ease.