You can try thinner sock too. At one time, I was having a lot of issues with my feet swelling around 35 to 40 miles into a ride. Thinner socks helped, and I'm actually going to admit that I got my wife to buy me some very thin women's ankle socks and wore those. And by thin, they were sheer enough to see through.
I also seemed to get the idea that my swelling was due to hydration and/or electrolytes. Drinking more seemed to help a lot and by mile 50 or 60 my feet didn't bother me. However since getting both my hydration and electrolytes somewhat dialed in, I've not had any swelling to the point of discomfort.