You should just familiarize yourself with the major inputs, major outputs, and unique tools. As you may notice, the tools seems to repeat (decision making, problem solving, data analysis, interpersonal skills, etc). There weren't a lot of rote questions on the exam asking for specific ITTOs. That being said, much of the exam is inferential in nature. You have to infer to the best answer given a scenario. ITTOs serve as a base to understand the general flow of information through the processes.
I just printed out each process chart (see pg. 419, PMBOK). I put these on notecards and did them before bed (process name on the front of the card, chart on back). I simply highlighted the major inputs, outputs, and unique tools.
I like studying the outliers. Do you really need to remember than an activity list and activity attributes are an output of define activities? WIthout even thinking about it, I bet you could assume the milestones are also an output (which they are). Do you need to think about tools used in any estimating process?
Hope this helps.