The best time to negotiate your salary for a new job is the moment AFTER they say they want you, and not before. Then it becomes a game of chicken for each side to name an amount first, but it is to your advantage to get them to give a number before you do.
"Life is not about waiting for the storm to pass, but learning to dance in the rain."
The success of an enterprise cannot be achieved without team cooperation and the efforts of every employee.