On Minecraft, XBox 360 Edition, I have a 40x40 block area that I plan to build in, except for one small problem; almost all of it is covered in tall grass. What's the quickest way to clear all of this tall grass? NOTE: I would like the actual grass blocks to stay intact
Pour a bucket of water down. It will knock the tall grass/flowers/etc off the block.
I suggest you use fire, though be careful not to let it go out of control
There could be a handy solution to solving grass problems that contain regular grass but could also work with tall grass. Sheep is the answer. Bring as many as you can and you will also benefit in letting your herds of sheep regain their wool quickly. If you simply want a quick and cheap solution, I would best recommend baby sheep.
Answers for other suggestions.
Water: They are very useful only if you have a flat plain, unlike in real minecraft, where you have slopes that water would likely take paths.
Fire: They could only be so far efficient solutions in heavily grown areas. (lots of tall grass)
Control water by only placing one "block" of it at a time and then when it's covered the desired area, just pick it back up with a bucket.