Each dog and each handler are individuals. What may be a task for one person, wouldn't necessarily be a task for another person, even if they have the exact same disability. For example, carrying medications in a pack for a person capable of carrying the medications in a purse, pocket or pack of their own would not be a legitimate task because it is convenient but not truly needed. You can add on as many bonus conveniences as you like later but you should start with tasks you actually need. That's the whole reason for having a service dog in the first place.
Shopping lists of tasks don't work because they short circuit the natural process of choosing tasks for training by encouraging the selection of trained behaviors that are useful, easy to train, or otherwise appealing but not truly needed. A person reads a check list of possible tasks and selects any that might apply to them, rather than ones they truly need. Need, and need alone should drive the selection of tasks. Not what anyone else has done and not what is possible.
There are several pieces to the puzzle in defining a task.
1. It must be trained, and not a natural behavior of the dog (such as
2. It must be to compensate for something the person cannot do for
themselves due to their disability, and something which cannot be
compensated for using ordinary means (such as using an actual alarm
clock instead of training the dog to act like an alarm clock).
3. It must mitigate the person's disability by making it possible for
them to do something they could not otherwise do in terms of a daily
Medical providers, friends, and family, who know you well, are in the best position to help you identify what exactly you can and cannot do because of your disability. Those are your impairments. The help you need because of your impairments are your needs. Tasks meet your needs in overcoming your impairments. So start with impairments, then needs, and *then* consider tasks.