True, by saying no to things you know you can't handle or that would be too stressful with your own schedule is beneficial in having time management.
Stress is NOT always negative
Positive stress (A stress) can help motivate you
Good nutrition and loving your body are very different. Loving your body can come with having good health. People can be considered "fat" yet still love their body. People can be considered "fat" but they aren't obese, where their unhealthiness is affecting their body.
I believe it’s attitude. Hope this helps!!