Restraint. Knowing what not to do; eg. having the patience to wait for technology to be reasonably mature before making your production environment depend on it.
Thinking things through before starting to code, or at least after a spike.
Valuing simple over clever; being most proud of commits that remove more code than they add.
Knowing most problems have more to do with people than code.
Ben Buchanan (200ok)
I make some bits of the web.