I'm new-ish, having found 70. Two pointers stand out to me. First one has already been stated:...when you get within a few feet, put the GPS away and look around. Also, there is some crazy clever camo out there. I used to look at something and think in my mind "I wonder if...." but wouldn't check. After getting burned by that a few times, I take NOTHING for granted. If you look and something comes to your mind, check it out. Put your hand on it, feel around, pick it up....investigate.