Tell them where they are and what is happening
Ask straight questions
When talking to the person, avoid information overload
Repeat if necessary
Keep eye contact
Always tell the person what you are going to do (e.g. make a phone call)
Keep instructions brief
Be sensitive, reasonable, consistent and calm
Be aware of cultural factors
Be aware of your non-verbal skills - Tone of voice, volume and pitch.
hot topics and long discussions
Swearing or put down language
If possible, it is better if the intoxicated person can be just settled down, even put to the person bed or removed from any position that may inflame situation.