Great question — answering as the UphillTech team:
Foot health and blister prevention is a large subject - you can literally write a book about it. My understanding was greatly increased by John Vonhof's Fixing Your Feet , which is regarded as the classic in the field. John is a faspacker and ultramarathoner who developed his skills treating thousands of endurance athletes during ultra events. He swaps ideas with many others in the field and regularly updates the book as experience develops. John does not recommend generic white sports tape - it's designed to stick to itself and does not adhere all that well to skin. Duct tape is cheap and workable, but for most applications there's a better alternative. If you're after the best solution...
Full answer by Tullochgorum: https://outdoors.stackexchange.com/a/17643 (CC BY-SA 3.0).
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