I believe he is planning to break Hinami out of prison, because he is becoming impatient. For instance, he says "Time is precious. We don't have enough of it to wait on the okay to top for every little thing." This could mean that time is running out for Hinami, and he is doing whatever is necessary to free her. Also, on the last page, you can see that Kaneki is marking out days on the calender, which is further evidence that he is losing time. Additionally, he has articles on his wall, which could be him brainstorming ideas.