Building a computer. i am building a computer for the first time.I have an intel p4 3E GHZ 1mb

Question

i am building a computer for the first time.I have an intel p4 3E GHZ 1mb L2-cache,800 MHZ FSB,478 PIN.& an asrockp4i65g motherboard.getting lost trying to work out what configures with what.i need a list of everything i will need from top to bottom & some suggestions on the best products.i know these arent the fastest components but thats all i got.thanks v much.