I'm sure it's just me getting old and lazy, but I got tired of bending over or getting on one knee to locate the stabilizer jacks and where I needed to place the jack wrench.  So I got a fat sharpie and made a mark on the bottom of the keder rail so I now know exactly where they all are.  This also reminds me to keep that area clear and not put a cooler, shoe box or something like that in front of the jack location.