Related:

• You know you've been hacking too long when... ...
  you want to retract something said in haste, and think C-a C-@ C-e C-w...
• You know you've been hacking too long when... ...after a large C program, you can't stop making algorithms.
• You know you've been hacking too long when... ...you pick up a pencil and wonder whether it supports the Norwegian letters (TeX \ae, \o, \aa).
• You know you've been hacking too long when... ...you wonder why you can't just go
  leep 28800& and go on with your hacking?...
• You know you've been hacking too long when... ...you ask archie where to find your keys.
• You know you've been hacking too long when... ...you begin all of your questions with "INPUT.
  . ....
• You know you've been hacking too long when... ...you can remember your ethernet hardware address.
• You know you've been hacking too long when... ...you count things on your fingers in binary.
• You know you've been hacking too long when... ...you discover that you're balancing your checkbook in octal.