"The only way I can get this job done is to keep plugging at it."

"Keep plugging away - even when you come up against obstacles."

But having someone there, watching, was an incentive to keep plugging away.

"I just want to keep plugging away and try to pitch well."

Takes a lot for people to keep plugging away when they can't see any results.

I want you to keep plugging away at that economy idea.

If you keep plugging away, good things are going to happen.

Or is it that he just doesn't have the concentration levels to keep plugging away over 4 days.

The route man could keep plugging and get us out of here.

We always kept plugging away, and that's what I was doing this time.