I just read an article on self esteem at rd2recovery.info and wrote down some self esteem aids that seem helpful.

1. list 5 positive things other people have said about you.
2. list 5 positive things about yourself. atributes/ accoplishments
3. share a compliment with 5 other people.
4. do something unrepentantly kind for someone that you percieve to be worse off then you.

I wrote these down for myself in order to try to remember to do them.

As far as your writing goes, this is what I do:
I am an artist and there are times when I just can't paint or draw. I keep two journals, one for writing my thoughts and the other for sketching ideas, no matter how crude. I look back on those and realize that 1. they aren't that bad and 2. it is easy to see where my mood has been.
It helps me a lot to focus or to just get out random thoughts and ideas.

Try not to believe all the negative stuff, even though it is easier to believe then the negative. I'll bet there is more positive things about you then your current situation will allow you to believe.
I hope you feel better soon

paintedgoldfish