How to handle a client that is arrogant? How can identify the right market for our product? How to access easily on the important documents needed?

Talk to him calmly. invite him to sit down and listen to his complaints, then advise him the best thing to do.

I would like to mention what I have learnt:

Just keep ice on head and sugar on tounge.

Making beilive customer for NO probable financial or any loss

Polite "Sorry" and to say " Don't worry, Sir, I am with you and for you"

Making notedown the problems in front of him and ensure to retally with him

Give probable time to solve the problem

Ask for his co-opreation also

To go with him to drop him at organization entry gate

and say " Thank you for the valuable time given to me, I do value for that,  Shall revert back to you shortly with updates"

By, Have a nice day.

To access easily to important documents you should maintain the data base very simply and clearly indicated at your office

Markets are not product wise infact products are marketwise. You have do decide at which market which product shall be compatiable