I don’t think this is the biggest chesed, but it’s on my mind now since it happened yesterday.
I was wandering through Kiryat Moshe looking for an early minyan with no success. I stopped someone and asked if he knew of an early minyan in the neighborhood; he said yes and walked me the three or so blocks to get there. We got to the shule, and he said “Shabbat Shalom” and walked away. I thought it was so nice that he walked 3 blocks out of his way to get me to a shule that he wasn’t davening at.
Of course, I could also say that the biggest chesed was my wife arranging for us to be in Yerushalayim for Shabbat to begin with. So nice, so relaxing, so quiet . . . and no kids!