So the "garage" that I park in isn't very wide; one day while backing out I forgot that my passenger side mirror was touching the wall. Very quickly the plastic framing it just broke, leaving my mirror dangling by the power chord that ran the motor inside the mirror.
I ordered a new one for $54.02 from AutoPartsAvenue on ebay.
Step 1: Removing the broken Mirror.
First open the door and removed the plastic cover that's directly across from the mirror inside the car. It should come off pretty easy. Then unplug the module and unscrew the nuts. You, or at least I was able to, can take all 3 of the nuts off without the mirror falling to the ground; however in my situation that wouldn't have mattered-it's broken anyway. After you've got your nuts in a safe place then you can get the mirror out of the way.
Step 2: Installing the replacement
The replacement came with everything I needed, save the nuts from earlier. If there is a tricky part to this (or at least if you're doing it by yourself) here it is. You need to set the new mirror in place and have the bolts go through their appropriate holes and then get a nut on there to hold everything together while you put the others on.
After the nuts are tight, not ridiculously tight however, I plugged the little electrical thingy back in.
Replace the plastic cover, I took a couple more pictures but for whatever reason they're not uploading correctly so I used the same pic from earlier here, but you know what I'm talking about.
Step 3: Test & VOILA
After I set the plastic cover back on in the inside, I started the car and sure enough the mirror works great.
If I have to do this again I'll be extra careful not to lose the nuts as I take them off, they could easily fall between the door frame and another piece of plastic and that would be a bad thing.