HA, HA, what a stupid mistake. That's usually how these lessons start, and this one's no different. It's always the little things that get you in sailing. You're in a rush, you skip the check you'd normally make, and it comes back to bite you. Here's one from my own logbook that cost me more than it should have. I sailed my US 25 out of the anchorage, or so I thought - clear water ahead, gusty day, and a shoal coming up fast to leeward. I figured if I hoisted the working jib quick enough, I'd have steerage to clear the mud flat. So I hauled the halyard lickety-split, cleated it off, dashed back to the tiller, turned around - and my stomach dropped. The jib was flapping like a limp noodle. The tack grommet had slipped off the tack horn. Sail slack top to bottom, and the flats getting closer by the second. Back forward I went, eased the halyard, got the jib re-attached - and we touched bottom right as I finished. Nothing hurt but my pride. Good thing those two little 2.5-pound Bruce anchors were sitting in the aft locker. Ran one out astern, winched us off a bit, ran the second one out past that, repeated the process, and eventually worked “Freedom” back into clear water. Error: I rushed the setup. Always double check your lines before you load them up. So here's the three-corner checklist I use now, every time, no exceptions. 1. Check the head. Three corners, three shackles or knots to check before anything goes under load. Halyard shackle - make sure the pin's seated in the detent. Splice or knot looking worn? Retie it. Takes thirty seconds, saves you the headache. 2. Check the tack. This one's easy to miss - it's buried under the sail. But a quick check and a twist on that screw pin makes all the difference. Snap shackles especially, they'll pop open without warning if you're not careful. In my situation I usually have a security line over the two horns to prevent this error. Tape the bale on shackles with rigging tape if you want extra insurance. 3. Check the sheets. Don't skip these either. I'm partial to the Lark's Head for the clew - never had one fail, and it doesn't snag on shrouds or hatches the way a bulky bowline can. Most sailors reach for the bowline out of habit, but I'll take the Lark's Head every time. (More on tying that one next newsletter.)