Even seasoned sports and fitness veterans understand the need to continual improvement. Yes, you can take it too far but you must strive to improve. You might have to let go of things you learned or were taught from childhood or maybe from some doctor who has his own talk show. I've had to do it and though it hasn't always been easy, it's always been worth it!
These are just general guidelines. They may help you or make no difference at all. We're all different. Depending on our environment, activity, diet and other factors the effects of the suggestions below can be widely varied.
Don't eat animal protein with heavy starches (steak & baked potato, salmon & rice, chicken & biscuits). Proteins require an acid environment for digestion while starches require an alkaline environment. The simple fix is to put non-starch veggies with your meat protein like salmon and broccoli. To get more enzymes to digest that protein, have a small salad at the beginning of the meal.
Leave a minimum of 2 hours between your last meal of the day and bedtime. Your body is less active during sleep (obviously) and digestion slows. Anything you ate is now more prone to turning rancid and unusable.
If you're trying to lose fat weight, eat only fruit until lunchtime. Its instant energy, quick absorption and vitamin/mineral/enzyme content make fruit ideal because it decreases digestive load so your body can use energy on other needed areas.
Exercise! Don't make excuses not to do it. Even if it's a 5 minute daily walk around your block, it will help you. Weight-bearing exercise is best for bone, ligament and tendon strength. If you like group exercise, choose Pilates or Yoga.
If you're one of those people who believes nothing unless it's backed up by scientific studies, check out the articles below. Keep in mind studies and their results can always be manipulated - the natural health industry, modern medicine, Big Pharma, government, education and more.