One time was devastated. I stay depressed for so long that I forgot how to be happy. I forgot how to smile, how to behave around people, how to feel good about myself, how to get out of bed in the morning. <br />
So I made a website with a profile of the person who I wanted to be. The profile had a hobbies section, a social life section... all the things I once have had and I lost to depression. I used to check that profile every morning, tried to remember it all through the day and act according to the person who I was trying to become. I has worked. I have much more of a life now. :)
As the old song says, "Count your blessings."
Mentally take 3 steps backwards and carefully look at the 'big picture' and look at where you fit into it. Then decide where you WANT to be in it and formulate/adjust your plan to get there.