God helps those who help themselves. Half a loaf is better than no bread. He who laughs last laughs longest. People in glass house shouldn't throw stones. Make hay while the sun shines.
Necessity is the mother of invention.
Never put off till tomorrow what you can do today. One man's meat is another man's poison. Out of sight, out of mind. Rome wasn't built in a day. The best way to a man's heart is through his stomach.