How to improve physical endurance

So you've started working out -- good for you! But are you finding that you're unable to keep up an activity for a long period of time? Your problem is endurance -- or lack thereof. I know -- I have this problem too, particularly when I'm running. Everyday Health has some good tips for improving your endurance:

• Build it up. Start off doing short workouts and then gradually build your time up. Listen to your body and take it slow -- you won't gain endurance overnight
• Up your effort. Take it easy at the beginning of the workout and slowly increase the difficulty. Make your workout just a bit harder each time.
  
• Work hard. Don't be afraid to challenge yourself each time. It will pay off.
  
• Exercise daily. Aim for 30 minutes every day.
  
• Divide. Yes, you should be getting 30 minutes of exercise a day, but no one said that had to be at one time. Schedule three 10-minute sessions a day.