I came across a neat piece of advice in Bruce Mau's Incomplete Manifesto for Growth.
Read only left-hand pages, he writes. Marshall McLuhan did this. By decreasing the amount of information, we leave room for what he called our "noodle".
I tried reading Sebald's 'Rings of Saturn' this way, and found that my brain (or was it my imagination?) did automatically try to fill in the gaps.
I did it too with my dad's log book. A document that had deliberately eschewed ambiguity, emotion or any vestige of personality - a book that claimed to tell it exactly like it was, no more no less - was suddenly riddled with suggestions of something missing, of things not said.