I try to avoid doing too much in a single day. 20 mins of the class, followed by an hour of slightly changing the instructions, or imagining, "how could I tweak

I try to avoid doing too much in a single day. 20 mins of the class, followed by an hour of slightly changing the instructions, or imagining, "how could I tweak it to do "this"", usually pays off the best for me, in terms of knowledge retention.