When I'm sitting in my car after class, I take about 5 minutes to rehash what went down into an iPhone voice memo. When I have time, I then transpose these memos to a private blog for easy searching of techniques. So by the time I get things in blog form, I went over the techniques three times: (1) taking the voice memo after class, (2) listening to the voice memo, and (3) transposing the voice memo into blog form. I feel like I'm not wasting class that way.