Been welding about 15 years and I still learn dumb little tricks, so here's one. Soapstone sticks snap constantly if you just toss them loose in a pocket or a box with your bolts and fasteners. Every broken stub is one you'll never use again beacuse you can't get a grip on it. What fixed it for me was keeping a few sticks in an empty candy sleeve, the kind the chalky dip sticks come in. Sounds silly but the paper sleeve is exactly the right size, it keeps the stick from snapping, and you can push it up from the bottom as it wears down like a chapstick. My sticks last months now instead of weeks. Fair warning though, soapstone looks a whole lot like those candy sticks, so label your sleeve or keep it away from kids and snacks. One of my guys grabbed one off the bench thinking it was leftover Halloween candy and got a mouth full of chalk. He was fine but nobody let him live it down.
Also mark on cold steel when you can. Soapstone wipes off hot metal before you even finish your tack.