although many people believe that atheists believe in nothing (as evidenced by some answers on this board), most of us know that's not true. atheists simply don't believe in god(s). period. but we believe in something and god is certainly not everything. what do you believe in?
i believe more in atom-ism than anything. it is the idea that we're all made of atoms, which are indestructible, but modifiable. these eternal building blocks get changed and reused (like soda cans, bad analogy, but oh well) over time. so, i'm a collection of particles from the universe and once i die, i will slowly decay and become a part of it again. here on earth it means that i am made of the same stuff as the planet, the plants, animals, air, sky, the molten core. i am made of the same stuff as the dinosaurs, and as the first man. it's the idea that i am one with the universe, not removed from it in any way.
I still respect the regular customs though, as in even though i believe this, and the most efficient way to deal with death would be a sky burial, i'm not planning to go that route. i still say i'd rather go with cryogenics after i die, in the slim hope that i may be brought back, because in the end i like being me.
i also believe in genetics and evolution. the idea that everything that was before (sort of) is in me, and the idea that i am one in a long string of those that came before, and those that will come after.
as for other stuff, supernatural stuff, i'm not so pompous as to think i know everything. there's plenty out there that is yet to be understood, even on planet earth, and to think otherwise is just to be a pompous jerk. i do believe that there's a lot of people who want to deceive though, and that's a right shame.
so those are my views.