Birdy

Cowboy Bebop

Dragonball

Flame of Recca

Gundam Wing

Hunter x Hunter

Inuyasha

Mononoke Hime

Oddments

Outlaw Star

Ranma 1/2

Rurouni Kenshin

Trigun

Yuu Yuu Hakusho

Daydream
I think everybody has spent some time this way. For me it was algebra class; my eyes were usually open but they sure weren't seeing anything.
 
Added: 11/1/07 From: Celga
 
Daydream