The Ri Guy
WKR
Everyone will tell you to pick a spot and glass all day... I honestly think that’s some of the WORST advice possible.
I think this is highly dependent on the terrain, season, pressure, etc. Where I traditionally hunt, which is highly pressured, the deer will be moving from before light clear until 10AM most mornings, and there's absolutely no way you're seeing 1/10th of them unless you're up high glassing. The local herd knows the game and they will hold up and wait in the thick stuff while all the road hunters and trailblazers go right on by.
As for my one piece of advice, it's called "still" hunting for a reason. If you're on the move, especially in thick stuff, then you need to be moving at a snails pace and you need to be cognizant of where and how you're placing your foot/weight. You never know what little pine, buck brush, etc. a deer is hiding behind. I've blown a lot of opportunities on bucks because I was going way too fast and they were tucked up in stuff you'd never guess a deer could hide in, and were either in the next county by the time I knew they had been there, or had gone right out my backtrack.