So, if you have an umbrella-style stroller and you find it painful to push, make some extensions!
Step 1: Lay out the new handles
I used a dremel tool to cut the rivets that held the handle on, but you could just as easily use a hacksaw to cut the tubes off if you sand or tape the cut ends.
Lay the new handles alongside the existing ones. In this image, the new handles are the dark blue ones on the inside.