Well, to start, you need to build your walls like a brick wall would be, not exactly over each other. This concept is kinda hard to explain over a message, so I'll give my best to try to explain. Let's say that we're using 2x4 bricks. Once you put layer #1 of bricks on, you then skip 2 spots so a layer #2 brick would be covering 2 even spots of connecting layer #1 bricks. Trust me, this is not nearly as complicated as it sounds. Just look at your nearest brick wall. Other than that, you build seems pretty mediocre.
-Tim Reed-
~In the snow I lie~
~I close my eyes and wish for pie~