Always remember this one rule. It's very important and it's the only rule that can not be broken.
Here goes;
The meat is done, when it is done!
With brisket, as with any other meat, there are many options. Some people just put on salt & pepper, rub it in, and let the brisket do it's thing. Others use a spice rub....
What you need to remember is that there is no right/wrong way. There is only the way that works for you. Find a recipe you like, and try it. If you don't like the result, try something else. It's the only way to learn what works for you.