This is such a lovely idea.
Second getting a pension as soon as you get a job and also setting up a savings account into which you pay a small, regular monthly amount. Also, maintaining a good credit rating. Learn to budget and live within your means as much as possible.
I also, like living by example and treating others as you would wish to be treated yourself. Remember everyone is someone's child/sibling/friend/partner etc. Equally, don't be afraid to be yourself and spend time with people who accept you for who you are and make you feel good about yourself.
Always be polite and respectful and try to do a little 'random act of kindness' everyday such as: holding the door open for someone or letting someone who is only buying a carton of milk go ahead of you in the supermarket queue.
Give little and often to charities close to your heart.
Enjoy your youth and make the most of every opportunity that comes your way. Being young will not last as long as you think it will and you don't want to waste a moment of it. Have fun and don't be in too much of a hurry to grow up. You will have a 'proper job' and a mortgage, bills and a weekly supermarket shop to do soon enough. Make the most of being able to spend your money on nights out, cinema trips and the like, before you need to use it to buy lamps, rugs and other boring household items.
If you are fortunate enough to be blessed with children in the future, be the best parent you can be. You want to be able to look back and know that you gave it your all. They will grow up so quickly and the relationship you have with them as adults will be affected by the way you parented them when they were children. Tell them you love them and kiss them every day. Spend time with them, play with them, listen to them and take an interest in the things that are important to them. Build their self-esteem, prioritise their happiness and always be there for them whenever they need you.
In dark winter days, you will never imagine that the summer will come, but it will. Time does heal and you won't always feel so low and troubled. The support of a loving family and true friends is instrumental here and perhaps the one good thing about bad times, it that it's a good sieve, and you are left in no doubt who your true friends are when you come out the other side.
Your health and your happiness are two of the most precious things in life and should be treated as such.
Finally, bear in mind that nobody - and i mean NOBODY - has a perfect life, however it may look on the outside.