As usual I've been watching Cobrinha's DVDs regularly, not so much for the technique instruction right now but for the match footage where I can see how he puts it all together. I'm constantly struck by his tenacity in following a technique through to completion. I'll probably be harping on it for at least another couple of weeks as it's proven itself yet again for me.
My current pet technique is the single collar choke. I've been setting it up from everywhere, using combos to get it, and being really persistent about keeping the grip and returning to the choke attempt over and over and over until it works. Last night it paid off for me again as I was able to use that approach to completely control one of my more athletic rolling partners. I usually find it very difficult to deal with his combination of strength and technique, but last night I was able to nullify almost all of that simple by constantly working for that collar grip and then once I got it keeping it and battling for the choke. It took a while but I finished it once and was very close to finishing it a second time.