Be careful about your scent when making the scrape and also while hunting it. Consider that a buck will probably approach from downwind, so your stand needs to be placed cross-wind from the scrape. Make the scrape in a spot where a deer would make one, overhanging branch and all. You can attach a limb to a tree or sapling if need be. Use a stick or even a rake to make the scrape, not your feet or hands.

Then you have a choice of commercial scrape scents. Plain, unscented ammonia works from what I've read. Many people urinate in mock scrapes. Scrape drippers are popular. I add fresh deer droppings, which generally aren't too hard to find.