Stay low-fi as long as possible.
There's something magical about pen and paper, or a huge whiteboard. Spending time working through flows, or sketching out thumbnails can often look messy but clarity and strategy eventually emerge. It also ensures I don't get bogged down in pixel-perfection too early in the process.
Discover, define, design, deliver and do over, as needed
I like to start with lots of questions, explore possible answers, find the viable pathways, and simplify continuously. Using this approach at the micro and macro level makes for a better end product.