That query string lesson you linked to is just some code I whipped up. There's no pattern in place there, other than "construct simple code." The former lesson you linked to is about form objects, which a number of developers have written about.
Pick up a general design patterns book, and do your best to work through it. They're a lot to take in, but you'll pick up some tips. Just be careful of taking them too far. Design patterns are meant to help you...they're not intended to lock you into uncomfortable architectures.