What did you learn too late in life?

I am 19.

Here's what I wish I learned earlier in life:

You can decide how you react to situations.
Everyday, be grateful for your protection and well-being.
Write down your goals for every week / month.
If you don’t sleep enough, it means your priorities need adjustment.
Someone who’s grateful is unstoppable; Gratefulness beats fear.
Wake up dancing to your favorite songs.
Become aware of your initial reaction to everything: Your Ego.
Good things happen to good people.
We live in a spiritual world with physical hurdles.
Learn to change your thoughts; Learn to change your life.
Be honest. Always.
If you are ready to lie about it, that means you need to talk about it.
Treat everyone as if you were to meet them again in the afterlife.
In the next 10 years, more than a thousand new people will meet you. Who do you want to be when you meet them?
Your happiness is not determined by your physical circumstances.
You can’t see your gifts because they are natural to you.
If you put someone on a pedestal, the only way they can look is down.
To improve your life by 80% over the next 12 months, experience the meditative state of living in the moment every day for 20 minutes.
Now is the time to decide how you feel on your deathbed.
You are barely a sand grain in the vastness of the universe.
Reward yourself regularly for trying to improve; what gets rewarded gets repeated.
True happiness is a passion.
Treat others as if they were you.
Watch a movie as if it was your last one.
One person is usually enough help you solve your problems.
Read every day, else you’re profoundly missing out.
Life is a 100% mind game.
Your personality creates your personal reality