Enjoy Today

I still have not learned this lesson. I do have days I truely enjoy the moment I am in...but far too often it is not the case. How do I teach myself to quit wondering what I could have done to make the past turn out different? How do I make myslef quit worrying about a future that has not shown up? Maybe it is all just the stress of an uncertain life right now. I did not think I would have THIS much trouble finding a job. Do I expect too much from a job position? A boyfriend? Myself?