Okay, so we've established the advantages, now we need to look at how to attain this goal. It isn't necessarily going to be easy to keep your dog's attention, and some breeds are certainly more difficult than others but here are some tips on how to achieve this with most dogs.
Use the sit command and a tasty treat. Your dog must already have learned this command and it must be solid – the dog must understand what is required of him and respond quickly to the command. You can read my article on teaching your dog the sit command if you haven't already taught him this.
So, give the sit command, asking your dog to sit in heel position, and use his favourite tasty treat to encourage him to look upwards at your face. Praise him when he focuses his attention on you, give him the treat and release him from the sit command. Do this again and again, each time increasing the time where he is looking and concentrating on your face. You want to have his attention, so he is responsive to your next command.
Soon, your dog will automatically look at you when he sits, because he becomes accustomed to being praised and given a treat. As with all training, you can gradually replace the treat with praise, just giving him an occasional treat to maintain his interest. Whenever you are not giving your dog your undivided attention when he is sitting to heel and looking at you, remember to give your release command. He will quickly lose interest if you are busy, and you need to continually reinforce and reward this behaviour.
Once you and your dog are working well with this in a quiet location, you can gradually add other distractions, increasing these in small increments to allow your dog to adjust. Praise him when he gets it right, give the release command and play with your dog – he must know when he has done well, and training should be a happy, pleasurable pursuit for both of you.
The next step is to extend this principle to heeling and other obedience training. Using the same procedure as above, gradually teach your dog that is to his advantage to watch you, to be looking at your for your next command, during all obedience training. The key to this is to build his attention span by tiny increments and praise him when he has done well. Never get frustrated or angry with your dog if he loses attention. This will be detrimental to his training – simply praise him when he gets it right and make sure, at the beginning, that the treat you choose is his absolute favourite. Praise, fun and patience are the three things that will gradually build obedience in any dog.