We could also acknowledge that locus of control can go both ways. Feeling like you don't have control of things in your life is generally not conducive to self-esteem, unless you feel like you are responsible for all the bad things. Some people feel like all the bad stuff is their fault, but none of the good stuff is under their control at all.

The ability to find and accept social support is also important (particularly the belief that one is able to make friends and feel supported, be liked, etc.).

Sense of competence makes a lot of sense to me. Lack of a sense of competence can be lethal. I read part of my brother's journals, and one major theme throughout his writing was that he was convinced that he could never make anything out of his life. Since life was pointless, he committed suicide. The scary thing is, my thoughts tend to go the same direction. I'm not actively suicidal right now, but T keeps bringing it up lately. Apparently I'm at risk.

Another factor I remember from a class is whether perceptions are global or specific. This one can go two ways too. If one thinks that bad things happen to everyone (global), then they won't be so upset when they experience bad things as they would if they believe that they are specifically targeted. But if we're talking about good things, if it's global then it's not so special as if one receives good things because they are singled out.

It seems like there was another factor too, which I can't quite remember. A couple of them tended to blur together. Maybe it was something about feeling like one deserves what happens to them. I'm not sure.

Here's another website though, about Attribution Theory:
http://www.as.wvu.edu/~sbb/comm221/chapters/attrib.htm