Have you read John Palmer's book "How to Brew"? It is where I got almost all of my information for brewing. Here are a few things I would recommend though:
1. Make sure you preheat your mash tun. I didn't and ended up scrambling to add hot water without oxidizing the mash.
2. Everything seems like it takes forever, but it is supposed to. Don't get impatient and lauter to quickly. I really wanted to speed up the lautering process but didn't and ended up with great OG.
3. Be organized. If you have a small kitchen like mine, make sure everything that doesn't have to do with brewing is put away, and don't try brewing when it make overlap with dinner, ie don't say you will cook steak for dinner and then start brewing 2 hours before. SWMBO will not be happy.
4. If your tap water sucks (mine does) make sure you buy enough water to mash and sparge with.
5. During the 1.5-2 hour boil, the wort will shrink quite a bit, so calculate before hand how much wort you will need for the required boil length. There are calculators for this.
6. Be sure you buy enough ice for the cooling of the wort. I bought two bags and it wasn't quite enough, so I go just past the cold break and then had trouble lowering the temperature with just cold water.
7. Always make a starter. I was thinking about not making one but it was very rewarding to wake up and see a krausen.
8. Read up as much as you can before you start the AG. I put atleast 10 hours into reading and studying how to brew AG before I even had my grains.
9. If you are ordering an online recipe, make sure you also order some DME. I didn't and was forced to use Malta Goya for my starter wort. It worked, but I am not sure what kind of flavor the residual in my yeast slurry will impart on the beer.
10. Patience.