I smoothed me out a piece of land today: http://mc.tomasu.org/#/5/64/633/-1/0/0. It kinda looks like a blank canvas, all the same height and no tall grass, with some ponds scattered about. I'll probably end up putting some rolling hillocks back in, but I wanted somewhere that I'm not constantly fighting the terrain.
I also used a lot of tools to do this, and I figured out that the cheapest way to fix them is to name them, then to repair them on an anvil with another, unenchanted, tool of the same kind. So now I have Woodsman, my Efficiency IV Unbreaking III diamond axe, Digger, my Efficiency IV Unbreaking III diamond shovel, and Kapow, my Power III bow. I didn't name the pickaxe because apparently it's too expensive to repair anyway, and I didn't name the sword because it isn't magic yet. Oh, I also have Satin, a Silk Touch iron pickaxe.
Naming is fun.