Popular use of leftover brisket is chili and Brunswick stew. Brisket and eggs is also good for breakfast. You can also add it to instant ramen.
If you're feeling little adventurous and want something more exotic, you could eat it as ssam. This is how I normally eat leftover beef brisket and pulled pork meat. Ssam is basically eating meat wrapped in lettuce or leaves. It's popular way to eat Korean BBQ. David Chang's Momofuku restaurant serves Bo Ssam which is basically roasted pork butt eaten in a lettuce wrap. New York Times published the recipe. https://cooking.nytimes.com/recipes/12197-momofukus-bo-ssam You don't have to use pork butt and can use any BBQ meat.
yep, excellent ideas.
I will be doing chili on the next one for sure, and may have to take a stab at the shepherd's pie.
Think I might just do some baked potatoes tonight.