I go as high as it takes but try to remember that too high will result in tougher shots at closer distances.One thing I don't hear mentioned here is what manyhunters used to say all the time,and that is to aim for the back lung.Also smaller game at closer distances is even harder yet at higher heights.I shot a hog from about 15'up and just under my stand recently ,and should have waited till the hog got away from my stand a few yards more.The vitals at that angle are extrreemly small especially on the smaller meat hog that I killed.It is best to wait for animals to be a distance away from your stand and you not being so high up.In other words like some said, and we all should know this a double lunger is paramount.