One of the things I've been trying to do is look for simpler or rules underpinning good or bad design. I think one of the most valuable rules is avoid duplication. "Once and only once" is the Extreme Programming phrase.
DRY ‐ Don't Repeat Yourself ‐ Every piece of knowledge must have a single, unambiguous, athoritative representation within a system.
Be careful to preserve the orthogonality of your system as you introduce third-party toolkits and libraries. Choose your technologies wisely.
