Check out the rubs and scrapes from the past year. They sometimes will use them in following years. Even if a buck is harvested, younger bucks seem to take over these rub lines and scrapes. If you hunt a particular area, make a rough drawing of the area, marking certain landmarks. Mark these rubs and scrapes on it. You may notice that some of them will show the route that a particular buck is taking through the woods by connecting the " dots" . With this knowledge, you may then be able to see a faint trail that you missed before. I made a sketch of my hunting area in the paint program and keep updating it as I find new sightings. I even note on it any deer that I see during any scouting trips. It' s my type of profiling the deer.