BATNA Best Alternative to a Negotiated Agreement — your Plan B. What you'll do if the deal falls through. Stronger BATNA = stronger position.
Concession Plan A pre-planned sequence of what you'll give up — like knowing which chips to lose first in a card game, so you keep your best ones.
Variable Trading Negotiating across multiple items (price, terms, volume) instead of just one. You can give on one while gaining on another — win-lose becomes win-win.
Guardrails Hard boundaries you never cross — maximum price, minimum terms, must-have clauses. Like the rails on a highway: you can drive anywhere between them, but never past them.