Finagle's Third Law:
  In any collection of data, the figure most obviously
  correct, beyond all need of checking, is the mistake.

Finagle's Fourth Law:
  Once a job is fouled up, anything done to
  improve it only makes it worse.

Gumperson's Law:
  The probability of anything happening is in
  inverse ratio to its desirability.

Rudin's Law:
  In crises that force people to choose among
  alternative courses of action, most people will
  choose the worst one possible.

Ehrman's Commentary
  Things will get worse before they will get better.
  Who said things would get better?

Commoner's Second Law of Ecology:
  Nothing ever goes away.

Howe's Law:
  Everyone has a scheme that will not work.

Zymurgy's First Law of Evolving Systems Dynamics:
  Once you open a can of worms, the only way to
  recan them is to use a bigger can.

Non-Reciprocal Law of Expectations:
  Negative expectations yield negative results.
  Positive expectations yield negative results.

Klipstein's Law:
  Tolerances will accumulate unidirectionally toward
  maximum difficulty of assembly.

You never find a lost article until you replace it.

Glatum's Law of Materialistic Acquisitiveness:
  The perceived usefulness of an article is inversely proportional
  to its actual usefulness once bought and paid for.

Lewis' Law:
  No matter how long or hard you shop for an item, after you've
  bought it, it will be on sale somewhere cheaper.

If nobody uses it, there's a reason.

You get the most of what you need the least.

The Airplane Law:
  When the plane you are on is late, the plane you
  want to transfer to is on time.

Etorre's Observation:
  The other line moves faster.