DO...

Wear comfortable clothes and sneakers.
Start slowly. Gradually build up to at least 150 minutes of moderately vigorous physical activity per week (or whatever your doctor recommends). That's 30 minutes of activity, five or more times per week  If you can’t manage 30 minutes at a time, try two 15-minute sessions or three 10-minute sessions to meet your goal.
Exercise at the same time of day so it becomes a habit. For example, you might walk Monday through Friday before lunch or dinner.
If you aren’t on fluid restrictions, drink a cup of water before, during and after activity.
Ask family or friends to join you. You'll be more likely to keep exercising with company.
Track your activity on a printable log or online.
If you miss a day, plan a make-up day or add 10–15 minutes to your next session.
Vary your activity to keep your interest up. Walk one day, swim the next time, then go for a bike ride.
Join an exercise group, health club or community fitness facility. Many churches and senior centers offer exercise programs, too. (Get your doctor's permission first.)
Look for opportunities to be more active during the day. Park farther from your destination, walk the mall before shopping, choose a flight of stairs over an escalator, or take 10–15 minute walking breaks while watching TV or working.
Add strength and stretching moves to your routine, if your doctor allows them.
DON'T...

Get discouraged if you stop for awhile. Get started again gradually and work up to your old pace.
Perform isometric exercises that require holding your breath, bearing down or sudden bursts of energy. If you're taking part in a class or structured rehab program, ask the leader or therapist what isometric exercises are.
Get involved in competitive or contact sports such as football or soccer.
Engage in any activity that causes chest pain, shortness of breath, dizziness or lightheadedness. If you have any of these symptoms, stop what you're doing right away and call your healthcare provider.
Exercise right after meals, when it's very hot or humid, or when you just don't feel up to it.