What goes where when using separate drives for data and applications?

Hello people!
In Mac Guru's "Guide to Macintosh Performance Acceleration" it states " Separating your "User" data from the Operating System and Applications is the simplest and most cost effective way to enjoy a significant performance boost at
minimal cost"...
Now how exactly do I do that?
I have a 40 GB HD with Panther on it and a 55 GB drive I want to use for the "data" drive. What goes where?
Thanks for reading!

Hello Danny:
Welcome to Apple discussions.
I disagree with the premise in that article - "significant" is relative and depends on where you are. The only method I am aware of to "separate" would be to create partitions. OS X uses sophisticated algorithms to manage memory - both real and virtual. There are very few good reasons to partition an internal HD - and several that suggest you should not do that - absent a "good" reason.
Barry

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