My best friend recently ran her first half marathon. The night before, I kept texting her with suggestions and tips. It occurred to me that it might be slightly less annoying if I just wrote it all down in one blog post. I'm certainly no expert in racing, but I WAS a total newbie just a couple of short years ago, and I remember what it feels like to be nervous and to have no idea what to expect on race day. I've picked up a thing or two during 6 half marathons, some from my awesome running f...