I debated whether or not I wanted to make this post since we seem to have gotten used to it happening, but I almost got banned from a server for suggesting this to the host.
Please pay attention to the number of bricks you place when you're building something. It doesn't take that long to do so, and it helps prevent lag on the server you're building on. Take a look at these screenshots:


This build uses up 131 bricks, not counting the "131 bricks" label on the roof. Now for comparison, here's the same build using more than just 1x1xZ bricks.


The second build only used 23 bricks, and it only took about 30 seconds longer to build than the first one.
That's all I really wanted to say. In short
(er), please conserve bricks when building. It's worth the extra time it takes to do so.