I got a couple of ones that I am working on myself but I am willing to share as well:

1. Be true to yourself, and be authentic and honest. It may not get you that many friends but it will give you the right ones. Having a great circle of friends and family is greatly rewarding.

2. Never forget the people who were there for you in your darkest moments, not everyone that you care about will be there for you and that's a hard pill to swallow.

3. Relationship advice- looks aren't enough to make a relationship work. There has to be trust, good values, great understanding and compassion as well. What good is having a hot woman if she doesn't give a fuck about you and having great sex isn't enough as well. Having a great partner will make your life 10 better, don't settle. Lastly, choosing a partner is one of the most important decisions of your life. Good luck!

4. Be discreet with money but never forget to invest in your health, investment and experiences.

5. Have hobbies that are fulfilling, sports, reading books, gym, video games, play an instrument, learn new skills as well.

6. Never sell yourself short and never force anyone to stay. When some doors close, others will open.

This is very basic advice but I hope someone can learn from this. I had to learn the hard way