Being good at negotiation is sort of a subset of communications, but it deserves its own space here. Negotiation isn’t merely haggling for the best price from a vendor or contractor, though that’s certainly part of it. Leading a project means you’re in constant negotiations. For example, you’ll likely get demands from stakeholders that can impact the scope of a project. You’ll have to give them pushback, but diplomatically, so all parties concerned feel they’re getting what they want. Then there’s the inevitable conflicts that will arise among team members or other people involved in the project. If you’ve got strong negotiating skills you can resolve these disputes before they blow up and threaten the project.