Don't let the wort boil over! I've done this and it's difficult as hell to clean off of your stove.
Run hot water over your containers of malt extract, it will make it much easier to pour.
Star-San is the absolute best for sanitizing. You can get a quart of it for like $20 and it'll last you many batches.
What are you using for bottles? I saved a bunch of Empyrean and Sam Adams bottles and just used those. A bench capper is better than a handheld though if you use commercial bottles. The necks of commercial bottles aren't designed for the stress and leverage that a handheld capper puts on it, and I've found that they break fairly easily.
Make sure your wort is cool (like 70* or cooler) before pouring into your fermenter bucket. You can buy ice (we used to put the kettle in the sink and fill the sink with ice-water several times, it took about 30 lbs of ice to do the job) , or this time of year just throw your brew kettle outside into a snowbank.
Make sure you have a good thermometer.
Have a big bowl or bucket filled with sanitizer solution. It's nice to have for sanitizing utensils, thermometer, etc when you're on the go.
If you're doing a kit, I assume they'll include a packet of dry yeast. You'll want to rehydrate the yeast for best results. As you start boiling the wort, boil about 1.5 cups of water in a small pan (to sanitize). Let it cool, covered, until it is about 85 degrees, and sprinkle your yeast packet into the water. Keep this covered for about a half hour and the yeast will be rehydrated and will add a bit of a jump-start to your fermentation.
What do you plan on using for water? I've never used tap water because ours is horrible. I usually go to Super Saver or other store and buy like 6-7 gallons of Spring Water or Drinking Water. It's like $0.70 a gallon or something so it's fairly cheap. Just don't use distilled water, you want some natural minerals in the water.
In general, just go over each step in your head to make sure you have all of the necessary equipment and utensils ready to go.
There is also another homebrew thread here:
http://www.huskerboard.com/index.php?/topic/33899-anyone-here-homebrew-beer/
I've only made like 5 batches but I love it and I'm still getting on my feet for starting some all-grain brewing. Great hobby!