It is only a matter of time before we have a periodic table of periodic tables.

table
The Periodic Table of Irrational Nonsense.

table
The Periodic Table of Mad Men.

table
The Periodic Table of Swearing.

Also, the Periodic Table of Awesoments. [via JK]

Update: There already is a table of tables! [thx DG]. Internet, I was foolish to doubt you.