These often result from a failure to communicate. Please be courteous to your patients. Try and keep your cool, even when provoked. You are a professional and you are obliged to act as such. If you are rude to a patient, and you turn out to be wrong in the diagnosis, or make an error, your are much more likely to generate a complaint, or legal action, than if you had been polite and courteous.
Keep accurate and detailed, but concise notes. Document notes at the time of seeing the patient-don't batch them to do in a pile. Only used accepted abbreviations – if in doubt do not abbreviate. Write legibly! See Record Keeping
When discharging a patient make sure they have clear instructions and when/if they need to return. Use advice leaflets.