Knowing when to get new clutch

In the interest of getting as much out of a clutch as possible, without being left on the road side, does anyone have a good indicator of when I should get a new clutch in my '97 GLX while I still have enough go drive to the repair shop? ~ Thanks

when the engine revs up and the car doesnt move accordingly, its time for a clutch..

Is it something that is gradual, and you can drive on it for a little bit, or is an "it slipped you're done" situation.

you might have a little time...like a couple of days..not much though

Thanks, I know what I'll be doing this weekend!