Frequent tipster Leonid Nemirovsky shares a small macro that he created that helps speed things up in AutoCAD's Break command.
"This macro improves the Break command, and is useful when you need to break an object at a selected point. It lets you select the point on the object first, then breaks it at the selected point.
(defun c:brp ()
(setq pt1 (getpoint"Select Braking Point: "))
(command"break" pt1 "@" "")
Notes from Cadalyst Tip Reviewer Brian Benton: Load the LISP file, then type BRP to start the command. Select a point on an object and it will be broken at that point — it's very simple and easy to do. If you don’t want to use this macro, the Break command does have a First option: Instead of breaking the object where you select it (the default behavior of the Break command), type the letter F after you select the object. This allows you to select the object, then pick where you want to break it, and then a second point (which can be the same point as your first point).