Riff - I am really sorry to hear that you had a heart attack. My thoughts and prayers are with you for a full recovery. I like Storm's idea of mapping your excercise with a group. I have done over 300 miles since January 1 in the gym and in my daily activities. You can track it on a Fitbit and link up with a group to encourage each other. I am a firm believer in exercise.
Good luck bro and speedy recovery. Your lifestyle change starts now! Take care of yourself.