Do you save your HH, and do you have PT or HEM? If yes, you can filter for hands that went to showdown, and replay them. On every street, put your opponent on a range, and as each street progresses, narrow that range down till showdown. You can keep track of how often his cards were in the range you gave him. It will be advantageous to be able to profile your opponent a bit. But this is an exercise you can do at your leisure.... IF you have tracking SW.
Otherwise, as mentioned above, rail games and put all players on a range. Like watch the game, keep a pen and paper or a PC notepad handy, and after 2-3 orbits, profile as many players as you can i.e. "seat 1 is a nit, seat 3 is a maniac, seat 4 and 6 look like they are playing smart, but seat 4 is much more agro and will bluff more agro, seat 6 is very TAG" or whatever. Then range each player on each street, and note your ranges, and see how often your are somewhat close. If you do something like this often enough, I believe it will be beneficial to your reading other players, and be more help than hiding your own cards.
I also wonder how many games AO played in that experiment.......