List of the Hell’s (de-)motivational posters:

• PLEASE do not LICK THE WALLS
• This office has gone  0  11  2  days without anyone saying  “The Road to Hell is Paved With Good Intensions″
• Clean up after youself, your mother doesn’t work here. YOU DON’T HAVE A MOTHER
• WE HATE YOU
• The Devil Finds WORK FOR IDLE HANDS TO DO - so LOOK BUSY!
• TO AVOID INJURY don’t tell me how to do my bloody job! 
• For More Efficient Service just rip out your own throat with a stapler
• GIVE UP NOW
• CHEER UP! REMEMBER – The Worst IS yet to come.
• You DON’T MATTER
• In Case of Fire, Send grateful memo to the Department of Infernal Flame

To illustrate the torture existing in Hell, Neil Gaiman created motivational posters for the walls. ‘I had too much fun with these,’ he says. ‘The hardest part was just persuading the art department that I was serious about getting them to forget everything they had ever learned about design.’ - Good Omens Companion

One of the oddest things was in Hell. I wrote a number of de-motivational posters for the walls of Hell. And the art department couldn’t get them ugly enough. Eventually, the production designer, the amazing Michael Ralph did possibly the most sensible thing that he could have ever done, which was to ask the youngest art department intern to do them and tell him that we encourage the use of lots of different fonts, and Comic Sans wherever possible. And we got these very badly designed posters, and they were exactly what we wanted. - Neil Gaiman (x)