The hand that rocks the cradle wins the world. Good fences make good neighbors. Imitation is the sincerest form of flattery. Discretion is the better part of valor. I am my brother's keeper.
Variety is the spice of life.
The dog is man's best friend. What is good for the pocketbook is good for the heart. The best things in life are free. There is no such thing as a free lunch. A rolling stone gathers no moss.