Wise sayings to live by...

So, from time to time certain "wise statements/principles" people have said to me will pop in my head at just the right moments for an appropriate application...these are some of the ones that I have actually listened to and it has really served me well...

1. Never spend more than you make

2. Choose your friends wisely- you become like those you spend the most time with

3. You can't un-ring a bell- meaning watch what you say- once its said you can't un-say it...

4. You should always be learning something new until the day you die.

5. Joy is a choice!

6. Better out than in (my Great grandma's take on tooting in public).

I have a head full of these, but these are just a few I have been thinking about lately(minus the last one-I just thought it was funny to throw in!)...what are some great words of wisdom you can testify to...