The Posse digs into a Brother-in-Law sandwich at Stanley's. (Photo ©Daniel Goncalves) Discipline and portion control were the guiding principles of our recent Best of Texas BBQ Tour. They have to be when you eat at 10 places over a period of about 48 hours. But while we focused on -- and scored -- only brisket, pork ribs and sausage, we did manage to sample other fare on the first day of the tour, when we visited only 3 places. At Stanley's Famous Pit Bar-B-Que in Tyler, we loved the smoked turkey breast and the Brother-In-Law sandwich, made of chopped…