I found these quotes in a 2002 Parade Magazine article by Andrew Tobias…

Annual income, twenty pounds; annual expenditure, nineteen pounds; result, happiness. Annual income, twenty pounds; annual expenditure, twenty-one pounds; result, misery.
Charles Dickens

Beware of little expenses. A small leak will sink a great ship.
Benjamin Franklin

October is one of the singularly most dangerous months to speculate in stocks. Others are November, December, January, February, March, April, May, June, July, August and September.
Mark Twain

The people who sustain the worst losses are usually the ones who overreach, and it’s not necessary! Steady, moderate gains will get you where you want to go.
John Train

I can calculate the motions of heavenly bodies, but not the madness of people.
Isaac Newton

He is richest who is content with least.
Socrates

Probably the greatest harm done by vast wealth is the harm that we of moderate means do ourselves when we let the vices of envy and hatred enter deep into our own nature.
Teddy Roosevelt

Buy straw hats in the wintertime. Summer will surely come.
Bernard Baruch

Rich people plan for four generations. Poor people plan for Saturday night.
Gloria Steinem

And from one of my favorite presidents…

There is no dignity quite so impressive, and no independence quite so important, as living in your means.
Calvin Coolidge