With bedding areas, which I tend to concentrate most of my hunting time, I hunt the fringes on the downwind or crosswind side. For example, my bedding area is a huge river bottom. I will hunt a North entrance/exit route with a S., S.W., S.E. wind for an afternoon hunt. Presuming they will be in the bedding area and leaving it heading to a feeding area in the afternoon. If you were to hunt this senario for an a.m. hunt naturally your scent would be blowing to them as they were heading into the bedding area. The same stand would work for a morning hunt with a North wind, but I usually skip that hunt, not wanting my scent wafting over the entire bedding area for any deer to pick which entered from a different direction. However, a North wind would allow me to still hunt the river bank on the South side of the bedding area. I save this tactic until the later stages of the season, not wanting to invade the bedding area too early in the season.
I usually hunt food plots in the afternoon. Deer seem to feel more comfortable feeding on the downwind side of a timbered area. If I have an alfalfa field on the North side of a wooded area, I would hunt it with a S, S.E., S.W., wind. The problem usually, in my area, is that the wind will "whirlpool" in corners and along the edges of wooded areas. A "Wind Tracker" device will help you see the wind patterns. It can be frustrating.