What has happened to your "get up and go"? Does it feel as if it has disappeared? Are you feeling sluggish, overly tired (but you can't determine a particular reason), or simply just unmotivated? Maybe the following blog entry by JJ Reich will help.
Just Not Feeling Up To Much Today?
"Hope deferred maketh the heart sick: but when the desire cometh, it is a tree of life." (Proverbs 13:12 KJV)