I'm a regular runner, and am doing my longest race to date next Sunday (excited!). Unfortunately I got new running shoes for my birthday about 2 weeks ago, and I keep getting blisters on the sides of my feet when I wear them. My old shoes are pretty beat up and not a great option either. So my question is, anyone have any recommendations for products that help with blister prevention/treatment that actually work. The things I've tried in the past tend to not work or don't stay in place. Thanks for the advice!