Overclocking help me plzz !!!!!!!!

can some 1 plzz help me.. i just got an asrock Z77 Pro4-M motherboard, and i want to overclock my i5-2500k. i read the manual , i checked youtube. i know a lil bit about it but i..the only problem is i do not know what settings are to be enabled or disabled..i am totally lost.it has UEFI BIOS , OR i can overclock in windows with AXTU- utility , but id rather do it in bios. her is a link for the motherboard http://www.asrock.com/mb/overview.us.asp?Model=Z77 Pro4-M ..and i got an i5-2500k cpu ,unlocked .... viper extreme 8 GB ddr3 - 1866 ram...if somebody could plzz send me a diagram or video or anything to tell me what settings i should keep on / off..voltage , etc etc. i will be extremely thankful. i got athermaltake silent 1156 cpu cooler on it now, not the best but does keep it cool....heres a quick list of what i got .

asrock Z77 Pro4-M motherboard - http://www.asrock.com/mb/overview.us.asp?Model=Z77 Pro4-M

intel core i5 2500k -- http://www.microcenter.com/single_product_results.phtml...

Patriot Viper Xtreme Series 8GB DDR3-1866 - http://www.microcenter.com/single_product_results.phtml...

Western Digital Caviar Green 500GB IntelliPower SATA 6.0Gb/s 3.5" Internal Hard Drive - http://www.microcenter.com/single_product_results.phtml...

Corsair Builder Series 600 Watt ATX 12V Power Supply - http://www.microcenter.com/single_product_results.phtml...

•EVGA GeForce GTX 560 2GB GDDR5 PCI Express 2.0 Graphics Card -
http://www.bestbuy.com/site/EVGA+-+GeForce+GTX+560+2GB+...

thanks guys for and tuturials or video or diagrams, whatever help s me best .. regards gary