For instance, you and your friends will figure out together how you'll spend the weekend. You can learn negotiation skills. Look for books on the subject, and if it is of interest to you, you can take courses to learn and improve techniques. Negotiations can take any form that the parties agree to use. They can be quite informal, such as an open discussion between two people.
Some negotiations can be more formal.
The parties will hire or use lawyers or other people to help them negotiate. Sometimes the parties might agree that using negotiation will be the first option to settle a dispute. The agreement also might state the form of their negotiations for future disputes. The parties will still have recourse to other methods of resolving the dispute such as mediation, arbitration or court proceedings.