I've been lurking for a week or so and figured this is as good a time as any to introduce myself. Just took A+ today and passed with and 574 core and 668 OS. I was very disappointed by my hardware score, but I'm chalking it up to the fact that I was very confident about that portion and flew though it, while I was quite nervous about the OS and went over the test a good 2-3 times before exiting. Still, passing is passing.
Points as I remember them:
-This test pounds Windows 2000. If you were going to allocate your time between OS, this would by far be the place to put the most effort.
-Many click path questions, as much as I hate them.
-Lots of networking stuff, have a good concept of DNS, DHCP, TCP/IP etc. Also know your cabling types well for the hardware test.
-Boot sequence for 9x and NT/2K/XP, know them and what the individual files do.
-I personally only got one or two IRQ/IO questions, but they're easy, so know them for the hardware portion.
-Study laser printer troubleshooting well.
Most important thing to remember is that process of elimination is your best friend. Most often, there are 2 answers that are absolutely ludicrous, allowing you to pick from only 2 seemingly reasonable answers. That's 50/50 odds right there, and adding in the questions to which you're absolutely sure of the answer, you're well on your way to passing.
Next friday... Network+.