Watch the motherboard mountings. Make sure you get the brackets on the backplate in the correct holes. Make sure the screw heads will not touch any traces on the motherboard. If the do, use the insulating washers.
Get some cable ties at Radio Shack so you can make it look pretty and keep the cables bundled for good air flow.
Static, is a concern, try not to walk while carrying your boards. Use some of the pink or blue packaging for an anti-stactic mat to lay parts on. When setting a board on it, place your other hand on the wrapping first then lay the board on it. Use the same method when plugging cards into your motherboard is mounted in the case, except touch the case first.
I use a black permanent marker and mark the number one pin on cable headers just so I can see them easier and have less chance of reversing them. I have fairly poor eyesight though.
Have fun and enjoy your new case.