There are a number of special issues that should be considered when designing a training program for a deaf dog. Most dogs will learn hand signals as quick or quicker than verbal commands so using hand signals is not a major issue. If you do use ASL you will likely have to adapt some of the signals to ensure that they are easy for your dog to see and distinguish, and so that you can perform them while you're holding a leash or are otherwise encumbered. An alternative or complementary approach is to use the standard obedience signals that are used in training hearing dogs before moving on to purely verbal commands. These have the advantage of having been designed specificly for dogs, and if you wish, you can start with these signals and then transition to ASL once your dog has the command down pat.
Attention is one of the most important and difficult aspects of training a deaf dog.
When starting out you will need a way to keep your dog's attention and interest during training sessions, and food can be very useful in this regard. Although some trainers disparage the use of food as a reward, it can be of particular value when working with a deaf dog. When starting out your training program, try to eliminate as many distractions as possible. As your training progresses, and response to commands becomes automatic, you can slowly increase the number of distractions. It will take some time before you can expect your dog to consistantly obey commands in the face of distractions such as other dogs.