Don't focus too much on killing an animal. Learn to enjoy the time in the woods and the relaxation that comes with it. By doing this, when something happens that prevents you from taking an animal, you were relaxed and can reflect on what happened and retain what you've learned. Before you know it, you'll put all the experiences together and be a more successful hunter in terms of harvest. Also, any time you can learn something about anything in nature and leave it better than you found it, you are successful.