Grand Rapids Atheist provides his reaction to this question:
I have never been afraid or needed to search for a reason to go to bed. I have a hard time going to sleep because I feel like I am missing out on life. I am eager for each new day and I cherish each day, no matter how boring or bad.
I don't believe in an afterlife. Once you believe in an eternal life that is infinitely better than the one you are currently in every experience, every flower, every moment, every glimpse of beauty and every human interaction becomes that much more meaningless compared to “what is to come”. This world is reduced simply to “a place to wipe your feet”.
I get out of bed and enjoy and treasure every second I get. I fill my head with knowledge and meaningful relationships. I enjoy every second I get with my son and wife, and all my family. When I am sad I am happy that I can feel enough happiness to understand sadness. I enjoy the ups and downs of real life. I have people who love me, I create my own thoughts and art. I enjoy other peoples art. I enjoy nature and the wonders of the real world.
The idea that atheists have no reason to get out of bed in the morning is disturbingly common — if not as an explicit claim, then has a premise behind some other myth or claim. Religious theists who take this position are effectively assuming that only their way of life is possible and that any attempt to do anything else must necessarily result in failure. This represents a tremendous lack of imagination — indeed, if religious theists can't even imagine how atheists can get out of bed in the morning and enjoy life, then it's difficult to see how any discussion on any other matters could ever proceed.