When we enter any kind of exchange from a win-win perspective, we may end up winning much more than we expect at the beginning. Especially when having to deal with negotiations that have an emotional power over us, when we are attached to the outcome.
A first step is seeing the situation form an objective way, not better, not worse. And the second important step that follows, is to see this negotiation from the other perspective, analyse their outcome and intentions. Remember that we are going for win-win, right?