Personally, I did a lot but wish I had done more. There were so many chances that I was afraid to take. So I would say seize the day and make the most of the opportunities that you have. If you think there are no opportunities then you are not looking hard enough.
Know that you are unique. Think. what kind of woman/man would I like to be at 30,40....
Learn something new about yourself,the world, seeking new ideas can be a wonderful thing.
If you haven't had one..... do NOT get a visible tattoo, again, think 30,40.