Do not worry about tomorrow, for tomorrow will worry about itself..

Do not be concerned about the future; keep your attention on today, and stay in the present moment. Just live one day at a time. Always do your best to keep these agreements, and soon it will be easy for you. Today is the beginning of a new dream.

Today, I will know that I don’t have to worry about anything. If I do worry, I will do it with the understanding that I am choosing to worry, and it is not necessary.

Never worry about tomorrow, Charlie Brown. Tomorrow will soon be today, and before you know it, today will be yesterday! I always worry about the day <em>after</em> tomorrow!

To do today's work well and not to bother about tomorrow is the secret of accomplishment

Leave nothing for tomorrow which can be done today.

I never think of the future - it comes soon enough.

La vida es fácil si se vive un día, cada día, sin pensar en los ayeres ni afanarse por los mañanas

Don't worry about the past and don't try to figure out the future

I don’t worry about maintaining the quality of my life, because every day I work on improving it.

I’ve learned not to worry about what might come next.

Don’t think about the future. Just be here now.

Do not anticipate trouble, or worry about what may never happen.
Keep in the sunlight.

Don't worry about a thing, every little thing is gonna be alright.