If you ask for the behavior and your dog is too excited or is not motivated to do it, gently help your dog into position by luring the behavior with a treat or walk away from your dog until he calms down. Then, work at a more calm level the next time until you are able to successfully get the behavior at any time. 

There are a few general strategies for teaching behaviors and here are some suggestions to help you get started teaching this behavior. 


Shape a Settle
- When your dog is lying down, gently pet him and give him treats
- If he gets up, you can either ignore him or ask him to lie down again and then pet him and/ or give him treats
- Say the cue, "Settle" after he is fairly calm and then continue petting and treating occasionally
- Release him at some point, "OK" and stop petting him
- Whenever you see him lie down, give him more attention and/or treats. This will motivate him to do that behavior more often.
Cue or Command Settle
- This is the same as above, but you will cue your dog, or ask him, to do the behavior
- Say the cue, "Settle" or "Enough" and then ask him to lie down and periodically pet him and/or treat him
- If he gets up, gently say, "Eh! Eh!" ask him to lie down again, and pet him and/ or give him treats
Speed Settle
- This is the final goal
- Work with your dog practicing a short training session or a game of tug
- Say, "Settle" and stop moving, interacting with him and put your hands behind your back
- Ask him to lie down and then treat him
- Work with him a bit more and repeat the "Settle" cue, but require him to lie down and settle for a longer period of time
- If he gets up, you can say, "Eh! Eh!" and ask him to lie down again, or say, "Too bad!" and walk away from him. Eventually he will learn that to continue playing with you, he needs to turn it off when you ask.
Keep in mind that you can turn this into a game by using a lot of enthusiasm and excitement when your dog performs the behavior. You can also reward your dog by throwing his favorite toy. 

Have fun with it and use it periodically throughout the day and reward with a variety of rewards such as throwing a toy, playing tug, taking your dog for a walk, giving a belly rub, feeding dinner, etc.