Your computer is screaming to be overclocked! There are sooo many awesome guides floating around, I'd start with those actually. I take it you haven't OC'd before? No problem, we have all been at the starting line at one point or another, but the best (and safest) way to start off is to do a bit of preliminary research, and only after you have that nailed down, we can help with the fine-tuning or peculiarities should they arise.
Start here:
http://www.bit-tech.net/hardware/cpus/2008/11/06/overclocking-intel-core-i7-920/1
I would also suggest that you start with the CPU and not worry about RAM, GPU, etc until you know you achieved the optimal (stable) OC with your CPU. The worst mistake I see people making is when they go on an OC frenzy and do everything at once. Another thing is, if you haven't done so yet, do a solid benchmark and stability test BEFORE you start OC'ing, this is done so you know where you stand at stock settings. Always a great idea to have a clear understanding on where you stand at stock so that you have a relative point by which to judge your overclocking efforts. Cool?