how do i prevent this bullshit?

i went on an 8-mile hike yesterday and had blisters develop by the second mile. i stuck it out and completed the hike, but i certainly would have enjoyed myself more if i didnt have those motherfuckers form on my heels.

i was wearing red wing iron rangers with wool socks. i know those arent proper hiking boots but i figured they would be better than wearing tennis shoes.