This is a great skill to teach all dogs. You can teach it in many different ways; In this blog I discuss one way to start this very useful exercise which you can progress as shown in the Vlog below.
1. At the start set your dog up to succeed. I would suggest that you start at a time when your dog is not excited and already relatively calm.
2. I would also start with a leash on your dog, which I suggest you place under my foot, giving the dog about 2/3 foot of leash. This will also becomes a cue for your dog to settle and relax, so when you are out and about with your dog and need him to settle you can just drop the leash and step on it, this should cue your dog to chill.
3. Once the dog starts to relax you can drop a treat for them or provide the with an pre-stuffed chew toy.