Congrats! I think everyone has hit on everything, so I'll take a stab at summarizing ...
1) Have fun. Don't worry about messing up. Just relax and enjoy the experience.
2) Be organized. As FxdGrMind noted, laying everything out ahead of time can help with #1.
3) Sanitize, sanitize, sanitize. Having said that, don't make it a PITA, or you might find #1 to be difficult. I think Palmer suggests saran-wrapping everything when not in use ... if it's easy for you, by all means do it, but I don't because the thought of being THAT anal makes me cringe.
4) Prep your ice ahead of time. Either pre-boil and freeze ahead of time to use as top-off as DuckAssassin suggests (don't forget to sanitize!) or collect your ice days in advance for the ice bath. If doing the ice bath, swirl or stir (sanitize the spoon!) your wort every so often as it chills to expose the hot wort in the center to the cold edges of the pot.
5) Save the drinking for later. Getting buzzed while you brew is fun, but dangerous. Maybe have one during the brew, but save the party time till after your fermenting vessel is in the tub.
6) No light. Stable temp. Sounds like the tub should work fine. To keep out light, you might use an old blanket or bath towel. It'll let you observe the fermentation progress (will prolly put your nose over the airlock to take a sniff a few times a day) much easier.
7) Take notes. Keep that blog updated so you can learn from your experience, and so everyone else here can too!
With two of the same kit, you might wait to do the second until after you've bottled and tasted the first so you can get an idea of what you want to change up for the second time around. To keep your mind off of it, maybe do a batch of Apfelwein instead?
You're just two days away ... good luck!