Awesome! Your first computer from scratch. I've built over four dozen computers for my clients as well as friends.
Get everything on a rubber mat: Best to avoid any sort of static build up, plus let's you know exactly what you have to do next by looking at what's left over.
Start of with the motherboard: I've find it best to assemble everything on the motherboard before inserting the whole thing into the cabinet. Start with the processor, then the RAM, the graphics unit and any add on cards.
