I see a lot of advertisements for wind checkers. You can get eye drop bottles that will spray talk powder. Or you can buy the spendy little bottles in the stores. I saw an older hunter a few years back that used a walking stick that would also dub as a shooting stick. He placed a feather in the stick to see what direction the wind was blowing. Seemed like a good idea, no worrying what pocket you last placed your eye dropper bottle in and it's always at the ready.