Great Spirit (I don’t like “Lord”. God is not a man, or even humanoid, and Lord implies someone as likely to beat you as be kind and generous, which is roughly the Christian–and certainly the Jewish– conception, if they are honest):
Thank you for this day (your life is the Spirit within you).
Please help me do my work with gentle grace, beauty, and gratitude.
Please help me to do better than yesterday in living up to my own ideals, and
Please help me fill my day with more love, light, life, laughter (it does occur to me that some forms of laughter are acts of generosity and abundance) and joy.
And when I lay down tonight, when my work is done, please help me sleep peacefully and in tranquility.
Amen (may it be so).
On a related note, it occurs to me that every day is the day of rest, if your work is filled with love.