Cut beef with grain into 2-inch strips; cut strips across grain into 1/8-inch slices. Place beef in shallow glass or plastic dish. Mix barbecue sauce, teriyaki baste and glaze and vinegar; pour 1/4 cup of sauce mixture over beef. Cover and
refrigerate at least 2 hours but no longer than 24 hours, spooning marinade over beef occasionally. Refrigerate remaining sauce mixture.