Are you asking about just walking to your car, or about ice fishing or similar? They all work somewhat, and they all get lost eventually. I'm an ice fisherman, and use Yak trax. They go on easy in just a few seconds. They don't grip all that well, but are plenty to keep you from falling as long as you walk like you are on ice. I've never fallen with them.
The very best on ice is boots with studs, however, it turns out they are not practical in the real word. Driving with them is iffy. No store will let you in with them. They are slick as snot on smooth concrete. The biggest problem for me is not the glare ice. The biggest problem is when you get a dusting of snow on that ice deeper than your grips. There is no perfect answer for this, but Yak Trax actually seem to dig in pretty well compared to studs with snow.