The following are some quotes and phrases that I like.
Do not worry about tomorrow, for tomorrow will worry about itself.
Each day has enough trouble of its own. (NIV Matthew 6:34)
And there is one Chinese idiom which carries the similar meaning..
今朝有酒, 今朝醉. 明日愁来, 明日犹
Which basically means "Be merry and drink to your heart's content while you still can. Do not worry about tomorrow".
Well, Life is short.
We never know what might happen the next minute.
So, why wanna worry so much ???
Enjoy life while you can.
Cos we only live once :)
Just my 2 cents. What say you? :)