By Myscha TheriaultMany of us are trying to make healthier choices these days when it comes to exercise and eating. And many of us are also struggling to make it happen successfully. I recently had a chance to spend the afternoon via phone with Kathy Kaehler, Today Show fitness correspondent for over thirteen years and personal trainer to such celebrities as Jennifer Aniston, Julia Roberts, Meg Ryan and Michelle Pfieffer. Her most heavily weighed piece of advice was on a surprising topic. Read o