Theory and Analysis:Asuka and the Bathtub
T&A page about whether or not Asuka actually attempted suicide at the start of Episode 24. Also take into account the 25' lines of "I'm alive...", her contradictory views of life and death (24, 25, 25'), possibly other stuff not mentioned.
This thread is useful http://www.evageeks.org/forum/viewtopic.php?t=3093