Every "Grey's Anatomy" fan knows that watching the show is an emotional roller coaster. We've experienced 12 seasons of heartbreak, death, betrayal, love and failure. Although we often feel like we want to shake the writer and ask them what they were thinking, we have learned a lot through the characters' experiences. Here are 10 lessons "Grey's Anatomy" taught us.

1. After you give 100 percent, the rest is out of your hands.

We get invested in many relationships, projects, goals and events in life. All we can control is what we give to them. We cannot control others and we certainly cannot control fate. Sometimes it doesn't go as planned. After this, you just have to keep your head up, knowing you gave it everything you had.

2. If you don't forgive others, don't expect them to forgive you.

If someone does something to upset you, put yourself in their shoes. Realize that everybody makes mistakes. One mistake does not define someone. It is often easier to forgive than to hold a grudge. Especially if you wouldn't want them to hold one against you.

3. Always say "I love you."

We never know when people will leave our lives. There is nothing worse than the feeling of knowing you left things unsaid. So always speak your mind and tell someone you love them. No matter how scary it might be, it will be better than never having said anything.

4. Life's too short to be a goody two-shoes.

Living life stuck inside of boundaries and boxes is no way to live life. Push those boundaries away and live life to the fullest. Nobody ever achieved anything great by following the rest of society.

5. Surround yourself with quality friends.

When it comes to friends, quality is better than quantity. We want the kinds of friends who we can call up at 3 a.m. to confide in. We want the kinds of friends who will always be there for us, no matter the distance or time since we've seen them.

6. Nobody's perfect.

Everybody has flaws. You should never hold others to perfect expectations. You have to realize that others are going to make mistakes and that you will too.

7. Sometimes we don't get what we want.

Things in life aren't always going to go the way you want. You're going to have to roll with the punches and make the best out of the situation. Complaining about something is not going to make it any better.

8. Always put yourself first.

Sometimes we get too involved with putting everyone before ourselves. Naturally, we want to please everybody, but we can't forget that we also need to please ourselves. Our emotional and physical health should be our number one priority.

9. Following your dreams won't be easy.

Following through with your dreams is hard. A lot of people aren't strong enough and give up. It takes a lot of dedication and passion to follow through. Don't let people discourage you from achieving what you want. You can achieve anything if you are willing to put in the work.

10. When life gets tough, turn to pizza.

Sometimes, when we get overwhelmed with stress, we need to take some time to recuperate. Eating pizza is a great way to do this. A good pizza can solve any problem.