One of the more difficult areas to make decent recommendations with any degree of speed is in the CPU department, especially now that we are entering an era where not everything is so x86, clock-speed -centric. The old x86 architecture is not only increasingly diverse within its own ranks, but is also now seeing competition from other CPU architectures: especially ARM, but also FPGA, MIPS, POWER8, etc. in some cases.
What resources can we recommend people take a look at when answering questions or formulating their own questions? I tend to have a lot of experience in the x86 space, so I can make a recommendation or two there, but I am missing any real resources when it comes to ARM and other architectures.