I hate to admit it, but I got this recipe from Semi-Homade with Sandra Lee. I made this for BUNCO last year and the meat was melt-in-your-mouth good and had wonderful flavor.
1 (3 lb.) beef roast
1 can beef stock
1 can cream of celery soup
Sliced new potatoes
1 pkg. beefy onion soup mix
1/4 cup steak sauce (I use either A1 or Heinz 57)
Place roast and all veggies in the crockpot. Pour beef stock and celery soup on top. Sprinkle soup mix on top of that and finally, pour steak sauce over the top. Cook for 3 1/2-4 hours on high. If your roast doesn't seem to be tender, continue cooking for another hour or so.