I posted the zip tie idea here on PFF a while back. Thought of it one night when I was too pooped to compress the spring using my (gloved) hands.
Lately, I've been using a mini pry bar, a flat steel bar, about 6" in length, with a crook in one end, and a V-notch in both ends (a miniature version of a "Wonderbar")- as a pusher.
Hold the bar with one hand, setting the bent end of the bar against the heel of the same hand. Catch the Ebrake spring in the notch with the other (straight) end of the bar, and compress the spring by pushing it. Your other (gloved) hand reaches around the strut, and helps guide the spring onto its seat on the Ebrake arm.
Works like a charm! Occasionally it takes a couple tries. I use it both to remove and install the springs, and it really saves time and effort. Reason: Pushing on the flat end of that bar with the heel of your hand, is lots easier than trying to push or pull on the spring directly with your fingers.