Beginner Existentialism and philosophy?

[providesound]

I've been starting to get into existentialism and I want to learn more but I feel it's difficult to dive into some of Sartre's essays where I really have no idea what I'm reading. So could you recomend some books or even a couple internet links (besides things like wikipedia) that could help me start out? I've read a couple of Camus' novels as well. Anything you think could help please and thanks!
I've been thinking of reading Nausea, thanks.
Sartre's Being and Nothingness is what I was reading when I realized I really need to learn more before I actually understand it. I have Crime and Punishment sitting on my shelf so I'll be reading that soon. I've also read a little on Nietzche's gay science.
I've read about Kierkegaard but I'll definitely check out the other wikipedia links. I'll look into all this stuff thanks for the answers so far.