Mamma's Brisket

This is the recipe my mom always uses when she makes brisket.  It is easy, so I have been afraid to try anything else!

Ingredients: 
4-6 lb. beef brisket
2 tbsp. Worcestershire sauce
1 or 2 tsp. onion salt
1-2 cloves of garlic
1 bottle liquid smoke
2 or 3 tsp. garlic salt
1 tsp. celery salt

Directions:
Mix all ingredients together and rub into trimmed meat. Put in baking dish, seal in foil and refrigerate overnight. Bake with fat side up at 250 for 6-8 hours. Let set 1 hour before slicing. Serve with BBQ sauce.