Burnt Ends are considered a delicacy in the BBQ world. They are pieces of the brisket's point, cut into chunks, sauced, re-seasoned and placed back on the smoker until they are melt-in-your-mouth tender.

When I cook brisket at competition, I like to have a full hour to create my "burnt ends" once the brisket is cooked. Click here for my complete Beef Brisket-cooking method.
I place the flat back in the foil and tent it to keep it as warm as possible.
Then I cut the point into burnt ends, toss them in the sauce, and place on the smoker. Just before turn-in time, I take the flat out of the foil and slice it.
To make the sauce, use 1 cup of bbq sauce mixed with 3 TBS of the au jus from the large aluminum pan. 
Cut the brisket into the desired slices and place the slices in a small pan. In the pan you canmix 1 cup of the au jus and 1 cup of bbq sauce. This will keep the slices moist and add flavor to them.
The flat never goes back on the smoker; it stays in the foil staying moist and warm as long as possible. Putting it back in the smoker will dry it out fast.