Last weekend I added a couple more gigabytes of RAM to my aging PC, bringing the total to 4 GB. This weekend, I finally bit the bullet and installed 64-bit Windows 7, upgrading from 32-bit XP.
Still trying to sort everything out. Five years of bad hard disk organization is biting me in the rump. :P
The nice thing is I'm starting fresh, with very few programs installed. Most of the ones on my old OS were unused, so it's fun to see how much free disk space I can have. It won't last long -- I'll install things as I need them, but it gives me a bit of a zen state for the moment.