Please try the following it might be helpful. It might take you up to 4 months to complete with no social life. I call it THE PLAN!!!
1a. Buy this book,.. RHCE Red Hat Certified Engineer Linux Study Guide (Exam RH302) (Certification Press) (Paperback)
~ Michael Jang (Author)
http://www.amazon.com/gp/product/007...pf_rd_i=507846
1b. Red HatŪ Certified Technician & Engineer (RHCT and RHCE) Training Guide and Administrator's Reference [Paperback]
http://www.amazon.com/gp/product/161...pf_rd_i=507846
2. Download and install CentOS,.. Install VMware workstation on it,.. If you have a enough memory and hard disk space run 2 Virtual Machines(CentOS) on it using that to practice the lab from the book above trust me you will be fine.
3. Get a book on Scripting,. You will need it. Also try to get your hands on any of this
http://www.linuxcbt.com/products_lin...ng_edition.php
4. Get your hands on these videos,.. Go through them at least twice.
http://www.vtc.com/products/red_hat_..._tutorials.htm
http://www.linuxcbt.com/products_lin...-5_edition.php
With all these you should be able to defend the cert that you have,..If you can really master all these,... experience will be acquired in no time.
PM me if you need further help.