If you can possibly stand it (I wouldn't be able to...), start spraying everything that you think you need to remove a couple of days beforehand with your choice of bolt remover. Even if it means having the kit on your bedroom floor, it will save you at least one trip to the hardware store for a busted bolt or busted tool.
If you can afford them, the gearwrenches mentioned earlier are amazingly useful. Definitely a good investment, likewise with deep sockets.
I would also add a friendly pair of hands to help if you can manage it. Or, if not at least tell someone you are gonna be underneath your vehicle with a wrench. You don't want to be discovered trapped underneath an axle three days later.
-Vice Grips come in handy in the oddest occasions.
-Anti-Seize compound for things that you need to remove later and lock tite for stuff you never want to remove or have fall off.
-A good Pressure wash before you start will make your life easy. Not the touchless ones, the wand type; where you get to stick the wand and wash the underneath; where all the fun stuff is.
-A whole bunch of rags and a wire brush. Cleanup those bolts before you touch them! Aside from keeping your wrenches and sockets clean, you'll get a better fit and will be less likely to round something.
-You may end up needing a set of those extractors for busted bolts and rounded heads. (I sincerely hope not though.)
-A prybar can be handy as well.
-Although there are a lot of horror stories about Snipes (A pipe on the end of a wrench to increase leverage) and double wrenching (Where you put the box end on the bolt and link the open end into the box end of a second wrench. same purpose as a snipe) I have yet to see either a wrench or snipe break because of it. Of course, the tools I was using were all high quality..... So be warned. A snipe is a last resort. To be used when lubricants, heat, patience and all other avenues have been exhausted and you don't give a damn if the bolt breaks.
-Patience is your best friend. If you try to remove something and it seems stuck, back off and let both the part and you cool down. You get to think, the part gets to cool, making it less likely to break. You may have to tighten the bolt before it will loosen again.
Just go slow, enjoy yourself, think of the awesomeness you are making and don't drink TOO much.
Hell, actually; break all of the bolts and have a totally rotten time. It makes a better story. Listening to a brutal install nightmare is second only to actually trail riding on these forums
Besdes, if you need more help, someone is always on here.