Personally I think glassing all morning or all day is a waist of time. I'd hit a good glassing spot right at day light and look around for an hour or so then I would start still hunting a likely area. 8000 feet isn't really high country in the West but not knowing where you are actually hunting doesn't help with giving a good answer. Where I've hunted at 7000 to 9000 feet its generally forested with smaller open pockets and one would be hard pressed to find enough area to glass for more then an hour from any one vantage point but start moving through the area and there is a lot of opportunity to glass small openings here and there along a still hunting route.
This get up high and spend all day glassing is something the TV hunters have made popular as it's easier to film then trying to follow a still hunter around all day. You being new to hunting would benefit from getting down in the brush and experiencing hunting, following game trails, checking water sources and blowing a few opportunity. Its hard to learn hunting or the area setting up on a hill all day looking through bino's.
My saying is its time to get off my butt and go make something happen instead of waiting around hoping something happens.