"Prosper" is a wonderful word. It means: "flourish physically; grow strong and healthy; be financially successful".
It is not as commonly used today as in the past--but it is something we all desire in one way or another. Most think of it only in financial terms, but its scope if far beyond money!
God gives us a "how to" in His Word, and today's Scripture is a key.
Blessed is the man who does not walk in the counsel of the wicked or stand in the way of sinners or sit in the seat of mockers. But his delight is in the law of the LORD, and on his law he meditates day and night. He is like a tree planted by streams of water, which yields its fruit in season and whose leaf does not wither. Whatever he does prospers. (Psa 1:1-3 NIV)