How can I SAFELY overclock my CPU?

This is my rig;

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System Information
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Time of this report: 10/22/2013, 22:32:08
Machine name: JACK-PC
Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130828-1532)
Language: English (Regional Setting: English)
System Manufacturer: MSI
System Model: MS-7788
BIOS: BIOS Date: 07/14/12 13:04:49 Ver: 04.06.05
Processor: Intel(R) Pentium(R) CPU G2130 @ 3.20GHz (2 CPUs), ~3.2GHz
Memory: 6144MB RAM
Available OS Memory: 6108MB RAM
Page File: 2836MB used, 9377MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode

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Display Devices
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Card name: AMD Radeon HD 7700 Series
Manufacturer: Advanced Micro Devices, Inc.
Chip type: AMD Radeon Graphics Processor (0x683D)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_683D&SUBSYS_32321682&REV_00
Display Memory: 3806 MB
Dedicated Memory: 1008 MB
Shared Memory: 2797 MB
Current Mode: 1600 x 900 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: Compaq Q2022
Monitor Id: HWP2919
Native Mode: 1600 x 900(p) (60.000Hz)
Output Type: DVI
Driver Name: aticfx64.dll,aticfx64.dll,aticfx64.dll,aticfx32,aticfx32,aticfx32,atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll
Driver File Version: 8.17.0010.1247 (English)
Driver Version: 13.200.16.0
DDI Version: 11
Driver Model: WDDM 1.1
Driver Attributes: Final Retail

With 2 monitors.


So I would like to SAFELY overclock my CPU but I want it to be stable, I have already slightly overclocked my gpu and memory performance using AMD CCC.
Will my CPU be overclockable and what bonus will it give me in games and overall performance.
Also what program is best to use for this?
Finally to test its stable I've heard a lot about stress testing, is this a viable way to check its stable?

Thanks in advance, any help is appreciated.