I heave-to almost every time I'm out, sometimes several times. It's my "go-to" method of just stopping, taking a rest, getting a drink, reefing, changing the stereo, calling my wife, whatever. In extreme cases I'll anchor. I'll admit: I don't ALWAYS wear the PFD (think freedom here, as in why some suicyclists don't wear helmets), but if the conditions warrant it in the least, that bad boy's goin' on! I made over 5000 skydives without a helmet, and there were many instances when NOT having one on saved my a$$ - better visibility, hearing, etc. No such excuses with the PFD I guess ...
I've done the HOB (Hat Over Board) drill a few times, and even a WPOB (Whisker Pole Over Board) drill once. Since I normally singlehand, my main concern is how will I get back to the boat if she tosses me. Prevention is key: the first rule of thumb is NEVER EVER EVER drop the mainsheet from your hand, unless hove to or anchored. The second is to pick your days, and never go out in conditions you can't handle. (Re) learned this lesson at the Trans Monroe last month ...
The capsize drill I have yet to do. Decided it wasn't necessary, maybe got a bit scared to do it, the stars didn't align, whatever, but this incident has really got me thinking ...