Preparing your meals in advance ensures that you won't be tempted to make a detour into a fast food establishment. If you want to have a gourmet meal for dinner every day, you may be setting yourself up for disappointment since gourmet eating may take more prep time than you have. Keep your breakfast (meal #1) simple, with foods such as oatmeal, yogurt, eggs, cottage cheese and whole wheat toast with almond butter (or organic peanut butter).
Having your meals prepared ahead and stored in a cooler with you will triple your chances of achieving your fitness goals. Look at the amateur and pro competitors. Whether they are male or female, competing in fitness and figure or bodybuilding, all of them will plan their meals in advance.