In my younger years, working as a photojournalist; I often encountered situations where I need to shoot at slow speed.
I learn early how to hold my camera steady when shooting slow speed, how to stand; holding my breath, leaning on wall for support; to ensure my shots are sharp.
With practice I was able to hand held shots as low as 1/8 of a second.
On the left, the majestic corridor of the Assumption University of Thailand was shot at a slowish 1/15 second.
The trick to a sharp picture at slower speed is NOT to jab your shutter release!
SQUEEZE the release down smoothly and only let loose your trigger finger AFTER you heard the shutter gone off.
After 1/8 of a second, the longer exposures are impossible to achieve sharp, hand held pictures; you need a tripod or a monopod.
