Sometimes, depending on what is happening. I find when everything is really bad that my mind is so hyper focused on the problems that I don't focus on SI, but that's always when the craving for it starts, and the idea will root itself into my brain, and then once things relax a little, I'm so used to having a problem to focus on that I'll SI to create a problem for me, which will cycle into guilt and disgust with myself, giving me something to distract myself with. This is generally more with long term problems, and in keeping with their ebb and flow in my life.

Othertimes though I'll SI right when the problem is occuring. This happens more if the problem is a shock to the system, something I didn't expect and don't have any way to handle it. Then I'll SI, because this will distract me right away.