Motherboard Transplant

I bought a new PC case that will be getting here in a couple of days, and I've been reading up on how to install a motherboard in a case. This is the first time I'll be doing this, so I'm a little nervous. I have a couple of questions that'll hopefully be answered here. First, does it matter in what order I unplug and plug the power supply and devices from the mobo? Should I unplug the ATX connection first and then the hard drives and all that stuff, or does the order really not matter as long as it's done within reason and logic? Same goes for plugging everything back. How should I hold the motherboard? I also read about metalized screw holes on the motherboard that don't require washers. My motherboard has little metallic dots around the holes. Does this mean they are metalized? Any other suggestions or precautions you guys have are welcomed.

The answer is no.

1 - leave your psu plugged in, but turned off, and touch it before touching anything inside the case to discharge static.  touch any tools you use to psu to discharge static.
2 - if the psu is off, it does not matter the order you unplug anything.  you will probably end up taking the plug off the mobo last as that particular plug is usually a tight fit.
3 - hold mobo by edges, safe to touch heatsinks if your discharged, but do not 'pull' mobo by heatsinks.
4 - observe how your mobo is in the case it is in now, that will  answer the question whether or not you need washers or not.
5 - be sure standoffs are in the case prior to screwing mobo in.  on my first build i almost didn't put those in (i had it screwed right to the case, but luckily something didn't 'seem right' and I consulted the internet before turning it on!)
6 - do not work with shoes on or on a rug, and just keep touching the psu every so often and static will not be a problem

Thanks, 3! However, in my particular case, the motherboard tray is not removable. How do I got about installing the standoffs?

METALIZING THE COUNTRYSIDE
METALIZING THE PEASANTS
METALIZING ALL THE PEOPLES
AND THEIR THATCHED-ROOF COTTAGES!

THATCHED-ROOF COTTAGES!

>>4
put standoffs in tray.  turn clockwise until attached firmly (but not too firmly -- should be easily finger-loosenable).

Is it a bad idea to use a magnetized screwdriver?

>>6
put cock in butt.  turn clockwise until attached firmly (but not too firmly -- should be easily finger-loosenable).

>>4
>>6
Is this for real? Please tell me that /comp/ isn't now about telling people how one uses SCREWS.
>>7
Yes. It will corrupt important data stored in very, very small mechanical HDDs contained within your case's standoff screws.

There's HDDs on the standoff screws?! Holy crap. You learn something new every day.

>>9
Oh STFU.  Everyone was nervous the first time they built their own computer.  I know I was, especially about little details.  You figure you spend so much money on parts and you don't want to fuck them up.

>>11
Quite right. I still knew how to use a screw.

I finished moving the motherboard from my old case to the new one about an hour and a half ago. Everything went mostly well. I forgot to install the motherboard plate on the case and the power LED doesn't turn on, but I'm too tired so I'll work on that some other day. The whole process was nerve wrecking, and I feel pretty accomplished, even though something like this is probably nothing to you geeks. Anyway, thanks for the advice, it really helped me.