Forming an agreement is simple once you’ve done the step of sharing what you want. You simply ask the other person how that sounds to them. Can they agree to do what you want? Do they have any hesitations or concerns? Do they want to do something different? The key here is to create a conversation that aligns everybody so each person takes ownership moving forward. If someone agrees to do something, and they chose to do so because they wanted to, they’re much more likely to do it.
