What is some advice you would give to your 21-year old self?

Did a quick search and saw a similar question but rather than a 21-year old self it was about 17-year old self. We all know 17 year have a tendency to not listen anyways! :)

So if you had the opportunity to give advice to a 21 year old you, what would you say to him/her? It can be about anything from:

* Life
* Body/Self-Image
* Money
* Career
* Sex/Relationships
* Parenting

Etc… and just to be clear this isn’t about what you would change about yourself but just what advice you would give to a younger self.