Rule of thumbs for UX: more options, more problems - Scott Belsky

Prototypes: if a picture is worth 1000 words, a prototype is worth 1000 meetings. - David and Tom Kelley

Design is discipline: there is no design without discipline. There is no discipline without intelligence. - Massimo Vignelli

White space: don't confuse white space with emptiness. Adrian Somoza

Know your customers: your customer doesn’t care how much you know until they know how much you care – Damon Richards