What is the consensus on the best partition scheme and size?/Keeping home separate

[linux <linux celticblues com>]

I want to install FC6 on my laptop.  When I install I usually do a 
complete new install instead of an update.  For example when going from 
FC4 to FC5, I did a new install.  how can I partition my hd so that I 
can keep  /home and not overwrite it?  Do I make it a separate 
partition?  What is the consensus on the best partition scheme and size?

Ed