1) Life is not "designed" to make us happy (*). ---> Don't feel entitled

2) You're just one in 7 billions, so - in a broad sense - you don't matter much (save for your parents) ---> Be humble

3) Despite the above, you have the potential to make a difference :-) ---> Honor your dreams

4) Your intuition is a wonderful tool but, at the same time, your feelings might be misleading ---> Learn to discern between intuition and feelings

5) The person you're attracted to might not be a good match; physical attraction is about sex drive and offsprings, not about being happy together ---> Enjoy attraction but do not base your relationships on that alone

6) Everything (and everybody) will change, sooner or later ---> Do not cling (to good things); do not despair (for bad things)

7) You (and everybody else) one day will die ---> This is the only sure thing in life

(*) This is hard to swallow at any age; especially for believers who have been taught that the world/universe has been created for human beings' enjoyment - while, in fact, there's absolutely no proof about it.