http://www.redbrick.dcu.ie/~proche/index/tutorials/HowToWriteUnmaintainableCode.pdf is a very funnty article but I'm afraid it is only programmers that will find it funny. The motive for the article is put simply in the opening paragraph.:

"Further, if you follow all these rules religiously, you will even
guarantee yourself a lifetime of employment, since no one but you has a hope in hell
of maintaining the code."