One quote that really as a meaning to it is this one here
"A penny saved is a penny earned"~Thomas JeffersonTo me this quote should be practiced by everyone and shouldn't be taken lightly. If you save your money for rainy days then you have earned a great deal. So it is important not to spend all of your money at once.
Another famous person by the name of Benjamin Spock once said;
“Trust yourself. You know more than you think you do.”Some people don't realize that they know more than what they do and should trust themselves with that information. I personally believe in this quote, if you don't trust yourself then who can you trust.
There is no need to worry about things that you can not change or things/people that refuse to change. There is always something more important than worrying about something silly.