Check a check-box field, from the keyboard.

Quick answer: Space Bar

Have you ever found yourself filling out fields in a form, tabbing over to each field as you fill them out, only to come across a dreaded, check-box field that painstakingly makes you reach all the way across your desk to the mouse, just to check this box?

Well, your suffering is over. Simply press the space bar to toggle the check-box and be on your way.