How do you know you are winning the endgame


when you know you're winning .. how do you maintain ?
Sit on your hands. Most blunders... in my case at least... could have been prevented with about ten seconds more thought.

However, most of the time I find "winning plans" and I feel like if I accomplish that plan, then I'll win or have winning chances.
So, most of my time is spent planning, then deciding how to execute the plan. And hopefully the plan is to win, and not to look for a way to draw.
There are also standard winning scenarios and position where if your exact position is a close match to the known winning position, then you can say with best play the position should be winning.