A soft anti static brush and maybe some isopropyl alcohol. If you are removing the board out of the case (assuming it is just a plane ATX board) you would probably meet a screwdriver (Philips or flathead or possibly even Torx) and some thermal paste for the CPU and some care. Also, it would not hurt to have a anti static wristband but you could get away with just touching a grounded surface but a proper wristband is better. That is about all I can thing off of the top of my head.