[Ol' Bob]

1 & 2) Throw flat and follow the lay of the land.
3) I don't. I work on watching my stroke and where it is. Since I get my power from my reach back and pull through, I put most of my concentration on my form, especially on uphill shots. I think this helps me more than anything to not sky my uphills. Downhills are easy to sky as well. Throwing downhill seems easy to me now, but it didn't always. Almost anything that goes wrong with almost any shot I make is usually traceable to trying to get too much on it.

Styles make discers. In any of these things, you'll have to find what works for you.