The "Down" comand is a very useful comand in order to do several others such as; "Roll" or "Prone" which can be used however more in competition wise. Comensing your dog to obey the comand "Down" first you have to have him obey the comand "Sit" after your dog sits, it is pretty simple.
1. Focus your dog on a teat/toy.
2. Comand the dog to sit.
3. Place the treat/toy in front of the dog's nose, once again out of reach and without him trying to jump.
4. Pull the treat/toy down until the dog's nose nearly touches the floor.
5. Last but not least pull the treat/toy towards you while giving the comand "Down"
6. The moment the dog touches the floor give him a pat and once again say: "Good Dogg!"
Here is a video explaning all this:
