First, I usually buy myself something nice to reward myself if I brought up a hard topic. Like an ice cream or chocolate bar, burger, something like that. Then, I write notes about whatever happened in session. Usually as detailed as possible, so that I later can read it again to cheer me up, calm me down or similar things.

That whole process takes about an hour, and after that I can usually concentrate on different things for a few hours, before processing it more in the evening.