You will simply quit thinking - the brain dies, and EVERYTHING that made you "aware" will cease to exist for you. Each person's world dies when they die. You more than likely will not know you are dying (if you're lucky), so the best thing to do is to treat each day as though it's your last... IMHO.

Ok, just for kicks let's say reincarnation is a reality, and we have had and will have countless moments of existence. It would seem that the conscious mind would immensely be cluttered if it could recall past or future existence. So for me, just because I have know recollection of past or future existence, dismiss this possibility I can not.

Think about what it was like before you were born.

I don't think it's possible to ponder "nothing." And I don't "don't believe" in an afterlife (sorry, I couldn't think of a better way to say it). Everything that we know about "us" happens in the mind, so it makes sense that whatever is "us" would cease to exist if there were no mind to create that. However, we've yet to be able to measure beyond death. So for now, it's the "null" hypothesis, and that's where I am. I accept the "null" hypothesis, but I still wonder what might or might not happen once the mind and body stop functioning.

[livescience.com]

In 1920 I did not exist. Nothing or non existence was not an issue "for me".

I am guessing it will be the same after I die.

For me it was lingering doctrines of religion. The longer I'm out the less I consider it and I just don't care anymore. I care about life but when that goes out it's like flipping a switch.