Drive a hard bargain
A gentlemen's agreement
The upper hand
Play cards right
Go down the wire
A sticking point
Stick to your guns
A decision or agreement taken at the very last minute.
To have more power than anyone else and as a result, to have the control.
To be determined and continue with your plan or opinion.
An agreement that is based on trust and that's not written.
In a discussion, it is the point on which it is not possible to reach an agreement.
To make the best and most effective use of the resources.
To be good at negotiating; defend your position and get the best possible deal.