Here are some common mistakes that people make while training their golden retrievers:

1. Lack of consistency: It is important to be consistent in your training methods and commands. Using different commands or rewarding certain behaviors one day and not the next can be confusing for your dog.
2. Not being patient enough: Training takes time and patience. It is important to be patient with your dog and not get frustrated if they don’t learn a new command or behavior right away.
3. Using punishment-based methods: Using punishment or fear to train your dog can be harmful and may lead to behavioral issues in the future. Instead, try using positive reinforcement techniques like treats, praise, and toys to reward good behavior.
4. Not providing enough mental and physical stimulation: Golden retrievers are intelligent and energetic breeds and need plenty of mental and physical stimulation to stay happy and healthy. Make sure you provide your dog with enough exercise and training to keep them entertained.
5. Not seeking professional help: If you are having trouble training your dog or if they are exhibiting problematic behaviors, it may be helpful to seek the help of a professional dog trainer or behaviorist.

To avoid these mistakes, make sure to be consistent in your training methods, be patient with your dog, use positive reinforcement techniques, provide enough mental and physical stimulation, and seek professional help if needed.