My first few years I hunted exclusively on the ground in heavily pressured public land. I had several "blinds" of natural material like trees and branches in a few locations overlooking prime deer trails and scrapes near bedding areas I had found in late Summer.

I had deer within 10 yards a couple of times, and within 20 yardsmany more.
Gotta play the wind when you're on the ground, and clear some shooting lanes looking both ways down the trails. Don't draw too soon. If you can see them, they'll likely see you when you move, so you'll want them in close and you'll have to shoot quickly. Although I currently hunt with a sighted compound, a fast instinctive shot would be ideal at close range.