Want to be a better man, back up all contents of my Powerbook to external drive. Can anyone recommend a backup program, and the easier (ie, even simple-minded can't screw it up), the better.
If you're using OS 9 or older, you can backup you system folder (and programs) to another volume (except the System and Finder objects which will be in use, which you can copy after booting off another system volume like the system CD). When in trouble, just copy over the backup system folder, reboot, and get back to work.
If you have OS 10.x, you will need to consider the UNIX junk under the hood, which makes modern Mac's about as complicated as PC's with config files, etc.
Therefore, you will need to make a disk image of the Mac volume (like with Ghost on the PC). The free tool is called Carbon Copy Cloner, which you can Google for the download site. It works very well and has many cool options.