Yes, use a low temp grease on your hubs for sure. A winter freehub overhaul would be ideal. There is a dismantling & relubing protocol on the net about the process somewhere. I haven't performed this protocol yet and want to as sometimes the pawls will stick in really cold weather. The headset or pedals don't need it. If you have a three peice, you could try it on the bottom bracket to see how it works. I use a sealed BB so a relube is impractical. I like to apply small spritzes of silicone spray on all the heads of the steel fasteners of the bike to help prevent rust. Be careful about overspray onto your rims or pads.