You've Heard of Murphy's Law

But there are many other such laws.

Here are a few:

After your hands become coated with grease, your nose will begin to itch.
-Lorenz's Law of Mechanical Repair

Identical parts aren't.
-Beach's Law

Any tool, when dropped, will roll into the least accessible corner.
-Anthony's Law of the Workshop

Nothing is as inevitable as a mistake whose time has come.
-Tussman's Law

If it jams, force it. If it breaks, it needed replacing anyway.
-Lowery's Law

The solution to a problem changes the problem.
-Peer's Law

There is no mechanical problem so difficult that it cannot be solved by brute strength and ignorance.
-William's Law

Handy Guide to Modern Science:
1. If it's green or it wiggles, it's Biology.
2. If it stinks, it's Chemistry.
3. If it doesn't work, it's Physics.

Machines should work. People should think.
-IBM's Pollyanna Principle

The most ineffective workers will be systematically moved to the place where they can do the least damage – management.
-The Dilbert Principle

The first rule of intelligent tinkering is to save all the parts.
-Ehrlich's Law

It is a mistake to allow any mechanical object to realize that you are in a hurry.
-Ralph's Observation

If you tell the boss you were late for work because you had a flat tire, the next morning you will have a flat tire.
-Cannon's Comment

Thinly sliced cabbage.
-Cole's Law

Dope will get you through times of no money better than money will get you through times of no dope.
-Franklin's Law