My second bottle of water gets electrolytes. I have a 1 liter water bottle. When I refill it, I pop in a Nunn tablet. Easy to do, easy to remember. Bananas also work great and are easy on the tummy.

I've read here and elsewhere that the rough-and-ready way to tell that you're low on electrolytes is to taste your sweat. If it doesn't taste salty, you're low.

It was 109 during my commute home yesterday. It felt like riding through an oven. I got stuck behind a city bus at a stoplight and decided to wait about 25 feet back because the heat coming of the back was so incredible.