Wasn't sure where to put this, but there's an interesting thread on reddit right now. Basically, people who have died or been declared dead at some point are describing what they saw, felt, or experienced.
http://www.reddit.com/r/AskReddit/comments/1ecfs8/redditors_who_have_died_then_been_resuscitated/
Some people describe it as dark nothingness, like a dreamless sleep. Others have had experienced a wide variety of things that give them feelings of peace or love.
It makes one wonder a bit. Sometimes I think that if there is something after this life, it's whatever we make it to be. People who expect nothing would experience nothing, whereas people imaging more 'heavenly' settings might experience those. Of course this operates under the assumption there is some other plane of existence.
At the same time you can look at it a different way. People who saw or felt euphoria might have done so due to peaks in brain activity right before they died or right after they were resuscitated. Those who felt or saw nothing may have simply not have had this rush of activity. That moment of death was just a small gap or blip in their consciousness.
It's interesting to ponder, though. I'm not religious but I'm not necessarily an atheist. Reading stories like the ones in this reddit thread are certainly stimulating for me. I'm curious to know what others think of these reddit stories or on the topic of "what's next" in general.