Although I call myself a Unitarian, my work habits on making these 388 HST's has developed some fine tuning. So I'm all about methods. I mean, a quilt pattern reads, "Make 388 light/dark HST's." Then, you are on your own!
What I learned, when I'm making so many with the Omnigrid right angle ruler, is to stack up FOUR of the 3 1/2" wide strips so that I'm cutting two pairs at once. Nobody mentions that. You hafta figure it out for yourself.
And I like to stack 5 of the doubled pairs to carry them over to the sewing machine from the cutting table so that I know that that stack will be 10 HST's when sewn. I chain piece them, one right after another, to save thread.
Another little trick that I use is to keep my count straight at all times. I count and recount my set of ten completed units, so that I'm sure there are ten on the pile. Then, the next ten units are placed kitty-corner on the pile for a count of twenty. I build piles this way until there is a stack of fifty units in the pile and then I start a new pile. More than fifty usually gets too tippy and you don't want them to all fall over. So here is a row of HST's that are four rows of fifty-unit stacks for a total of 200 done! yippee!