What do hikers put on their feet to help not get blisters?

I'm going to go on a backcountry backpacking trip soon. I've already been walking to prepare, i was wondering if there was a specific lotion or something to put on my feet to help. I mean, most foot cream is for softening feet, and i'm not sure you want soft feet for walking 10 miles a day. I would think the softer the feet the more easy to get blisters. But i have no idea. Which is why i'm asking. I Did 7 miles today and my feet are okay, they don't hurt too bad, just want to know what real hikers use.