James Davis, Jr.
My advice is to try and see everything!
Really though, try looking at the feet. Footwork is a big deal.
Agreed, followed by what side (omote or ura) is the nage going to.
You might also like watching the technique that night after class relaxing with a beer; go here
and see if you can find the ones you did that night; once you do, watch if a few times. Don't get too caught up on the names of the techniques (i.e. they might not be called exactly the same where you train).
*edit* Ooh! My post count is like a Magnum handgun!