RHCE == practice, practice and red those red books given by Red Hat.

Also try to broke Red Hat linux installation and try to fix it.

For example (following are question I got when I wrote RHCE)

Remove bash shell with rm command and try to fix problem
Upgrade kernel
Samba security configuration
NFS and NIS configuration
Iptables etc

Search on isohunt http://isohunt.com/torrents.php?ihq=...t+&ext=&op=and for red hat, u may get few dumps.

All the best for exam