I've learned that I get the best results by shaving every 36 hours. So if I shave Monday evening, I wait until Wednesday morning to shave again, then Friday evening, etc. If I instead shave every 24 hours, my skin doesn't have enough time to completely rejuvenate after each one, and irritation accumulates. And after experimenting for a year and a half with different razor blades, I've concluded that German Wilkinson Sword blades are perfect for me. I'll now look for others that perform as well, just to satisfy my curiosity.