Practicing negotiating and having bargaining chips ready are important so that you are prepared when an opportunity to negotiate comes up.
Practice is easy, especially if you have children. They seem to be born negotiators. Don’t view the task of trying to convince them to eat their veggies as a chore. See it as practice negotiating. Think of a compromise solution that is moderate. Neither of you will get exactly what you want, but you will both get something and both give something.
Anticipate what the other party will want, but don’t start there. Start high, so that you have some room to work down. If your child wants to eat zero veggies, but you want her to eat 5 carrots, start with 10.
Have your bargaining chips ready. If you are asked to do something heinous, make sure you have something already pre-loaded that you can ask for in return for the favor of doing the crap work. For the child example, the child could request a dessert, if she eats all 10 carrots, as requested. That would be good forethought on the child’s part, and she would be eating all her carrots. You wouldn’t mind giving her the dessert after 10 carrots.
Obviously, there are other examples that don’t include kids, so please share. The point is to see the negotiating potential in all situations, and to practice your skills. It will eventually become second nature.