I saw this on TV the other day and thought it to be very profound and effective. It goes something like this…

If you’re asking me to do work for you, you may only have 2 off the triangle.
Examples:
If you want the work Good & Cheap, don’t expect it Fast
If you want the work Good & Fast, don’t expect it Cheap
If you want the work Fast & Cheap, don’t expect it Good

This is a wonderful way of looking at commissioning any type of work, whether it’s a plumber, a web designer or a decorator.