Newbie Question: how to overclock my System?

Hi,

I am wanting to OverClock for the first time using the BIOS or tuning program that I may be able to use. A program or two come with my Mobosupport CD. I have read the guides for AMD club and could not find my processor on the list. I built my system 3 months ago. I need to know the most stable settings for this.
Also I have used the Asus Auto-Tuning before for 5-6 weeks but one day it Blue screened and said Overclocking failed at POST. I did just get my Video card about a week prior to that. I used the Trixx program about a day prior to the Blue Screen to do some overclocking to the GPU. I raised the GPU clock to 875 and the Memory clock to 1300 and Board Power Li to 1. But in order to boot the PC required me to Load Bios defaults. I did undo the Video OC I had done also.
I currently use the Asus Core unleasher and it is activated. It was active when I had the Auto tuning OC for me.

Strangely I get Blue Screens periodically as well. Maybe 1-2 a month.
So here are my specs.
Specs:
MoBo: Asus M4A88T-M
CPU: AMD Phenom ii 1045T 2.7Ghz
Graphics: Sapphire Radeon HD6950 OC edition
RAM: Corsair XMS3 2x4Gb 1333 Mhz (10666)
HDD: Seagate 2TB Barracuda Green
PSU: Rosewill Hive 750W Gaming Supply 80plus Bronze
DVDRW: Lite-On DVDRW
CPU cooling: CoolerMaster Hyper 212 plus
Case: ThermalTake Armor A90
Cooling: Air -3x 120 mm and 1x 200mm fans
OS: Win 7 Home Premium 64-bit

So I hope that someone does not mind helping me to know whether Overclocking is worth the effort with this build or if it is that they won't mind to help me.
Thanks