 Your effort should be to not do things, and 20% of your effort should be to do them once you've figured out what is safe. If you're a type A, you believe that 80% of life is do something and see what happens, and only 20% is figure out if it makes any sense. So type A's believe in a thing called the mud-on-the-wall theory of transactions. It means if you throw enough mud on the wall, something's got to stick.