DO Start Off Moderately
Work your way into a routine. Going overboard after a long respite from exercise may result in injury, or at least disappointment. Your workout shouldn't do either, so build up from a moderate beginning.

DON'T Over-Exercise
For maximum benefit at minimum injury risk, the body needs to rest and recover. At least a 24-hour rest after heavy muscle strain is advised. Stagger workouts between heavy and light strain. For example, you can alternate a weight training routine with biking.

DO Warm Up and Cool Down
A low-impact warm-up before any exercise is essential. It warms the muscles, makes them more limber and easier to stretch, which results in a better workout. It also helps to prevent injury.

DON'T Push an Injury
Listen to your body. If you feel pain, stop. Muscle and joint pain can mean many things pushing a small hurt can lead to big problems later on. If pain persists more than a few days, see a doctor.

DO Stretch 
Flexibility is one of the most important factors of fitness. Stretching before, during and after a workout will result in better performance, good posture, fewer injuries, and overall better fitness.

DON'T Get Bored
Don't get bored with your workout. New exercises can break the monotony, and the excitement of perfecting new skills can help motivate. Since different exercises work different parts of the body, a diverse workout will aid overall fitness.

DO Find a Workout Partner
If motivation is your problem, a workout partner might be the solution. A partner can motivate you to workout when you normally might not, and can help improve your workout by watching form, encouraging extra effort, and pacing. Try to pick a partner with abilities equal to your own.

DON'T Lose Concentration
Preoccupation with outside situations can counteract the benefits of a workout. For example, you might decrease intensity as you lose concentration. And not paying attention to a workout can lead to sloppy style and potential injury. Instead, use the time to concentrate on proper form and control. It will lead to a better workout, greater benefits, and a more relaxing experience.

DO Watch What You Eat
Diet is just as much a part of fitness as exercise, and what you eat will affect every aspect of your workout. A proper diet also influences the results of you fitness plan, since it helps build muscle and decrease the percentage of fat in your overall body weight. Visit the Fuel for Fitness page for more nutrition information.

DON'T Dehydrate Yourself
When exercising, the body needs four to eight ounces of water every 20 minutes to replace water loss. If you become thirsty during a workout, you've already passed out of a "safe" stage of hydration. Take fluids immediately. If you are working out for more than an hour, you may want to consider sports drinks, as the extra carbohydrates help retain body water. But try them out first, as not all work, and some may cause unwanted reactions. Always avoid caffeine or alcohol when exercising, both of which further dehydrate your body.

DO Have Fun!
The benefits to working out don't pay off if you don't enjoy yourself. This isn't an excuse for not exercising, as it's still vital to your health. But finding a workout that you enjoy will make the difference when setting a workout schedule that will stick.