These things are important to note, because where the fish are on the water is what determines the lures you should use to catch them.  If they are on the top, you are going to want to use floating or 'top water' lures that stay near the surface and make splashing movements to attract the bass.
 
When bass are holding in the middle areas of the water, you will usually have some pretty good bass fishing, but the lure choices will, again, be different.  You should use anything from baits that have a swimming action, to shad rap type lures, diving plugs, and rattlebaits.   For fishing the bottom of the body of water (particularly good during cold months) but you will need to use flipping rigs, worm rigs, and deep diving crank baits.  Be sure to present slowly and steadily when fishing this deep for bass.
 
Finally, when it seems there is nothing you can do to entice a bite, think small.  Just kick everything down to the smallest possible size.  The smallest line, the smallest tackle, even hooks, split rings, snaps, EVERYTHING you can downsize, should be downsized.  This usually happens when the fish are spooked or the fishing pressure is high, but you CAN catch bass, if you just know how!

To get the full "3 Top Largemouth Bass Fishing Techniques" article you'll need to download it here.