Because it would be too easy to simply put my new 1 GB memory module in the user-accessible location on the bottom of my Thinkpad (one captive screw, incredibly easy to remove), I attempted to remove the keyboard in order to get at the memory module that is located beneath the keyboard. In the process, I manage to "strip" three of the four screws that keep my keyboard in my laptop. However, the real ultimate power of having 1.5 GB of memory made this worth it.
From page 68 IBM's Thinkpad Computer Hardware Maintenance Manual from my computer (T43 2668W12):
Never use a screw that you removed. Use a new one. Make sure that all of the screws are tightened firmly.
I did experience strange problems, but I was able to fix them by reseating the memory modules, not by using new screws.
 strip - to destroy the "drive" of a screw so that it cannot easily be removed.
 A large part of the reason I bought more memory is the fact that Evolution, the Linux PIM program that I use, has horrible memory leaks. After a number of times of leaving Evolution running for a couple of hours and realizing that my computer had ran out of free memory, because Evolution was using 300 MB or so, I had enough. While that no longer occurs, other programs do seem to be using more memory. Like goldfish growing to fill their bowls/tanks/the New York City sewers, Linux programs seem to adapt to the amount of memory available.
I would use Thunderbird (like I normally do when I use Linux), but I really like having a calendar and tasklist. I like to pretend that it helps me get things done.