Murphy's Laws of Computing

When computing, whatever happens, behave as though
    you meant it to happen.

When you get to the point where you really understand your computer, it's probably obsolete.

The first place to look for information is in the section
   of the manual where you least expect to find it.

When the going gets tough, upgrade.

For every action, there is an equal and opposite malfunction.

To err is human .  .  . 
To blame your computer for your mistakes is even more human, it is downright natural.

If at first you do not succeed, blame your computer.

A complex system that does not work is invariably found
   to have evolved from a simpler system that worked perfectly.

The number one cause of computer problems?

Computer solutions offered by family members.