For shooting uphill or downhill the standard wisdom is to bend at the waist to maintain proper alignment and the "T" formation with the shoulders. Up to now I've found this not to work too well for me. It's the right idea but it always felt awkward and uncomfortable for some reason and I would lose focus on my back tension. Tonight I had an idea that seemed to work quite well for me. Instead of bending at the waist I bent at the hips. If I was shooting uphill or at longer distances I'd move my hips out to the left (I'm right handed). If I was shooting downhill I'd move them to the right. It resulted in the sa,me effect as bending my waist. It allowed me to elevate or lower the bow, keep alignment, keep the focus on my back tension and I shot a lot better.
It worked for me. If you were having the same issue I was it might work for you.