Never frown,even when you are sad,because youn ever know who is falling in love with your smile.

If he could frown, he would.

It' s easier to smile than doing the opposite - you actually use less muscles while smiling than while frowning or making an angry face.

Do not frown when someone is laughing, Laugh with them.

But still, if you start smiling more your smiling muscles will soon become stronger than your frowning muscles.