Are these the top six fitness tips?

If you could boil good fitness advice down to six essential tips, that would be a pretty handy thing to have, wouldn't it? The knowledgeable people over at eDiets have tried to do just that, coming up with the six top fitness tips. They include:

• Keep workouts intense, but under an hour (unless your a distance athlete).
• Challenge your body and avoid fitness plateaus by changing your workout every 4 to 6 weeks.
• Slow and steady wins the race. Gradually increase the duration and intensity of your workouts.
• Vary your strength training routine every 3 to 4 weeks.
• Consider interval training to burn fat.
• Don't neglect flexibility. Add Pilates, yoga, or stretching to your routine.

Now you tell us, That's Fit readers -- are these the top 6 fitness truths? Or do you have something different you'd put on this list?