Negative emotions can lower your immunity. They affect every part of your body. Carrying them up to sleep will affect your health causing you to lack the necessary rest your body needs.

Doing something that lights you up can help shift the mood. Force your mind to think of good thoughts. 

Your brain relaxes when you do something that is delightful. It puts you in a safe zone where you can enjoy yourself for the time being.

Doing it just before going to bed is the best time because it helps to seal the positive energy that will condition your mind the next day.

A state of relative comfort created a steady level of performance. In order to maximize performance, a state of relative anxiety is needed—a space where our stress levels are slightly higher than normal. This space is called "Optimal Anxiety," and it's just outside our comfort zone. 

Too much anxiety and we're too stressed to be productive, and our performance drops off sharply.

• Your comfort zone is neither a good or bad thing. It's a natural state that most people trend towards. 
• Leaving it means increased risk and anxiety, which can have positive and negative results.
• Don't demonize your comfort zone as something holding you back. We all need that head-space where we're least anxious and stressed so we can process the benefits we get when we leave it.

A tradeoff is inevitable in almost every decision we take, as we usually forego some opportunity or benefit in our choices.

Many people strive for everything and believe there are no tradeoffs.

Focussing on less can get you something but focusing on everything may get you nothing.

We seem to think that the people around us have everything in life.

Tradeoffs in others take time to become apparent. Everyone lets go of something, making a sacrifice, to be able to focus, investing time and energy in what is important to them.