I’ve been training for a survival course that i’ll be taking in about a month. My boots fit by every standard and are the recommended boot for my type of foot. They are well broken in a comfortable. After 10 miles in the heat however, I start to get blisters. Not bad ones but I can imagine that 20 miles in desert heat for 2 weeks will begin to have an effect. Is there anything I can do to toughen my feet to avoid blisters. Rub them with alcohol repeatedly or something?
Some people swear by tincture of benzoin, but I haven’t tried that.
I tend to wear sandals on my hikes, and my feet are nice and tough from the exposure to the sand, grit, and dry air we have here in the desert. Even small thorns don’t really bother me. Maybe for the next month you can hike part of the time in your boots, and part of the time in good hiking sandals?
Of course, it all depends on the terrain you will be training in. Don’t go into the brush with only sandals on. (I saw a rattler a few days ago.)
Moleskin. Apply it in places the blisters are likely to form.
I got this advice from a bunch of Marines that have lots and lots of humping/hiking experience. But then again they are jarheads, so ya never know… 
Try rubbing your feet with some very fine sandpaper. Rub it enough that it’s a little raw, but you don’t risk infections from open wounds or anything that extreme. The other good way is to soak your feet in water until they are at that mushy prune stage. Then take a wet washcloth and elbow grease to slough off some of the skin.
Both work better than having blisters during a hike and are only slightly painful.
Hmmm…some hikers like to use duct tape, too.
Thanks for the ideas so far. To elaborate, I won’t have access to anything like moleskin, duct tape, plasters, or anything to be used while on the trip. It’s hardcore survival. Anything that can be done will have to be done pre-trip so Im thinking more along the lines of toughening my feet. Thanks again.