书面表达第一节One possible version:Dear Editor,I am writing to share a good habit I kept during the summer vacation -morning jogging.First,it has greatly improved my physical fitness.I used to feel tired easily,but now I havemore energy for study.Besides,jogging clears my mind and helps me stay focused throughout theday.To make it a lasting habit,I set a fixed time -6:30 a.m.every day and never made excuses.I also invited my best friend to join me,which added fun and accountability.Even on rainy days,Iwould do indoor exercises instead of skipping.In short,this simple habit has changed my life.I believe that with determination and a clearplan,anyone can turn a good intention into a lasting routine.Yours sincerely,