I use wind socks and they work good at times. They are not good if you are in current and the wind is in the same direction. The current will take the wind sock full of water and acutally pull you faster. This happend to me yesterday on the TN river at Clifton.

I have never tried chains but have read some about them. Ths issue i see with them is that once you come over a brush pile or stake bed you are ampt to get hung up with the chain or at least run off the fish.