Always look at the bright side of your life.

Always look at the bright side of your life.
いつも人生の明るい方を見なさい。

But look at these wrinkles! These days, I no longer have any time or money to get rid of there wrinkles!
でも、見てよ。このしわ！この頃はもう、しわ取る時間もお金もありゃしない！

Don't look at me like that!
そんなふうに見ないで。／そんな目をしないで。

Don't look at me weirdly.
変な目で見ないでよ。

Don't look at the floor or ceiling during a conversation.
会話中に床［足元］や天井［頭上］を見てはいけません。