Recommended

Apple's Mighty Mouse. I've been a laptop user for so long that the whole idea of mouse use is somewhat unfamiliar. But thanks to Bluetooth, you can now get a wireless mouse that's simple to carry around in your bag and use when appropriate. What's more, after years of resisting the whole two button mouse concept, Apple's gone and developed the most elegant implementation of it out there. Unfortunately, they seem disinclined to brag about this since that might entail admitting that they were wrong on the utility of the second button, so you actually need to go into the system preferences and change one of the default settings to enable the right button functionality.

Also recommended: Third party RAM. Someone pointed out to me a little while back ago that RAM's not nearly as expensive as I thought -- Apple's just wildly overcharging people for it. And they're not even wildly overcharging for some kind of double super-secret proprietary RAM -- you can buy stuff that plugs right into your computer all over the internet with ease. It's just a pure price discrimination scheme: don't be a victim, but also don't be running your computer without enough RAM.