Sometimes it's hard to be optimistic. Sometimes it's hard to be grateful. I think it's easier to just succumb to depression every once in a while and wallow in self-pity. Stress is a motivator.
When I start the day off thanking the Lord for all of my blessings, I know I do better all around. If it's a day I go to work, I AM more alert and aware, more enthusiastic and optimistic. I know starting a day off with gratitude will help me make the most of whatever kind of day it is. I forget at times to be grateful when I stay home all day and still can't accomplish much more than loading the dishwasher. I notice those are the days I end up feeling sorry for myself and procrastinating things till the next day.
My goal is to start EVERY day off with a gratitude prayer. Not to ask for anything, just to be THANKFUL for everything. I can always pray again if needed, but wouldn't you like to have your children just tell you thank you sometimes?