Phil Barrett recommends Occam’s Razor to help keep complexity under control.
“Two interfaces – choose the simpler one.” A no-brainer, right? Simple designs are easier to implement and maintain, and quicker for everyone to learn and use. But choosing a simple design when you see it is actually surprisingly hard. Organisations with lots of people, objectives and agendas will generate complexity faster than you can say “knife” (or indeed “razor”).
The article is well worth a read.