This is an old and easy favorite:
1 slab of beef brisket -- at least 4 lbs
1 bottle of your favorite BBQ sauce -- I use Safeway brand hickory barbecue sauce
Put the brisket fat side down in your slow-cooker (Crock-pot). Pour the BBQ sauce over it. Cook on low for 8-10 hours.
Then take out the brisket and shred it (using two forks, pull the meat apart in opposite directions until it looks, well, shredded).
Put the meat back in the pot with the leftover BBQ sauce and stir.
Toast or warm your favorite bun. My favorite is Kaiser rolls, but hamburger buns work well too.
Put the meat on the bun, and enjoy a taste of BBQ heaven.
Good with fresh corn on the cob, baked beans, etc.