Place roast beef in crockpot. If you want an easy cleanup, use a specially made crockpot liner, then add the roast beef. (Sorry, no pic this time!)
Gather your seasoning packets. I like to use mushroom gravy, but any brown gravy will do.
Measure 2 cups water and add all seasoning packets to water. Whisk well.
Pour mixture over roast beef in crockpot.
Cover and cook on low for 10-12 hours.
When finished it will look like this.
Remove from crockpot and place beef in serving bowl.
Serve and enjoy!