I Got My Heatsink, Now What?

I am planning to switch out my stock heatsink for a cm hyper 212+ and do my first overclocking on my 2500k. My question is... what do I do before and after I install my heatsink? I know to check my temps and stuff but what programs do I use? Is there anything else besides checking your temps? If you guys know, then can you guys tell me the whole routine you guys do? Sorry I'm just really lost and stuff. Like how do you start if you don't know where to start? lol Tell me EVERYTHING (even if its just minor) because I want to learn Thanks

I have tried searching for an answer but i can't find any, if you do happen to find a post with the same problem then you can just post the link thanks again

Take before and after temp readings.
You can use both of these together,i do.
http://www.alcpu.com/CoreTemp/
http://www.techpowerup.com/downloa [...] _3.70.html
http://www.softpedia.com/get/Syste [...] Test.shtml

I use the CoreTemp gadget you can find on davcon's first link! I got my 2600K up to 4.4GHz while being slightly under the 1.35V Vcore. Intel says that 1.35V is the max reccomended and look at the link below just in case you think you need it....

http://www.tomshardware.com/news/I [...] 14519.html

thanks guys and when im taking the temp readings, do you suggest i do it while the computer is idle? if yes then what do you mean by idle? is it just turning on the comp, running the programs and waiting for a how much minutes? thanks again