If you are new or newer to mountain hunting, focus on diurnal winds and more importantly when the diurnal "shift" takes place. Usually, as a rule of thumb, it begins around 10am in the mountains (a little earlier in the summer and a little latter in the fall and winter months). The valley floor heats up and the wind goes up hill, in the afternoon/evening it reverses. Fronts are going to change this (of course) but you can pretty much set your clock by them on a "normal" day.
This is also important as a buck (especially if he is by himself) will usually bed with his back to the wind facing down hill in the a.m. They trust their nose to cover their 6 and their eyes for their 12 o'clock. The diurnal shift will take place and put the wind at the bucks face and if everything works perfect can allow you to pull a sneak up behind them with the wind in the bucks face while he is looking down hill, giving you the high ground to come down on him. Simple in theory, but the only place it is simple!
I have found the diurnal winds to be pretty constant up into October and even on nice November days.