I see the highlights of one's life flashes before them, and then they grow very warm and serene. And if there is a strong existing guilt in them towards some person they knew/known they begin seeing them right beside them and pleading for acceptance and forgiveness. But I haven't shuffled off of this mortal coil just yet so I would not know (I guess that's why it's in the philosophy forum!)
I've heard that some scientists say that a few seconds after you die (or right before you die, I don't remember) the brain will send out some signals and make the dying person feel really happy and peacefull. At the same time the center of the brain that keeps track of time is "turned off". So, they mean that these seconds of happiness will feel like an eternity.
But noone really knows for sure. I've heard a lot of different philosophies of what happens after we die. I think the scariest one is one that says that you just end up in a sort of waiting area, all by yourself, where you'll just sit and wait for an eternity for something that will never happen. You just sit and wait...
Well we'll just die and see what happens, but I don't believe in the religious prize-punishment approach to an after-death stage. That's like some divine dog training in my opinion. We will obviously die sometime, what happens later if anything happens, I'll wait and see.